Study Sheet Flashcards

1
Q

Factor: a²-b²

A

(a+b)(a-b)

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2
Q

Factor: a³+b³

A

(a+b)(a²-ab+b²)

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3
Q

Factor: a³-b³

A

(a-b)(a²+ab+b²)

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4
Q

Slope Formula

A
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5
Q

At an x intercept, what is y equal to?

A

0

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6
Q

At a y intercept, what is x equal to?

A

0

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7
Q

What is the equation for the standard form of a line?

A

Ax+By=C

Note:

m = -A/B

x intercept = C/A

y intercept = C/B

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8
Q

What is the equation for a line in slope-intercept form?

A

y=mx+b

Note:

m = slope

b = y intercept

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9
Q

What is the equation of a line in point-slope form?

A

(y-y1)=m(x-x1)

Note:

(x1, y1) is a point on the line

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10
Q

Parallel lines have the same…

A

Slope

Note:

All vertical lines are parallel.

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11
Q

Perpendicular lines have slopes which are…

A

Negative reciprocals of each other.

Note:

Their product is -1.

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12
Q

What are two lines with the same slope, but different y intercept called?

A

Parallel

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13
Q

What are two lines with the same slope, and same y intercept called?

A

Coincident

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14
Q

What are two lines that are negative recipricals called?

A

Perpendicular

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15
Q

What are two lines with different slopes, but not negative reciprocals called?

A

Oblique

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16
Q

Distance Formula

A
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17
Q

Midpoint Formula

A

Note:

(x1,y1) and (x2,y2) are points.

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18
Q

Quadratic Formula

Note:

If ax2+bx+c=0

A
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19
Q

What is the equation of the discriminant?

What does the discriminant do?

A

b2-4ac

It determines the number and nature of the roots.

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20
Q

If the value of the discrimnant is positive then how many roots of what nature are there?

21
Q

If the value of the discriminant is zero then how many roots of what nature are there?

A

1 real (double root)

22
Q

If the value of the discriminant is negative then how many roots of what nature are there?

A

2 imaginary or complex

23
Q

How do you find the sum of the roots in a discriminant?

24
Q

How do you find the product of the roots in a discriminant?

25
am+an=
am+n
26
(am)n=
amn
27
a-n=
1/an
28
1/a-n=
an
29
(a/b)m=
am/bm
30
am/an=
am-n
31
a1/n=
32
am/n=
33
General form for a conic section:
Ax2+By2+Cxy+Dx+Ey+F=0
34
In which conic section is the locus (set) of all point a given distance (radius) from a given point (center)?
Circle
35
General form for a circle:
Ax2+Ay2+Dx+Ey+F=0 Note: A=B, C=0
36
(h, k) form for a circle:
(x-h)2+(y-h)2=r2 Note: Center- (h,k) Radius- r
37
Identify this conic section.
Parabola
38
In which conic section are the locus of all points whose distance from a given point (focus) and a given line (directrix) equal?
Parabola
39
Quadratic in x: axis of symetry parallel to the x-axis - Which ways can it open?
Up or Down
40
General form for a parabola (in x):
Ax2+Dx+Ey+F=0 y=ax2+bx+c Note: A and E are nonzero. a is nonzero.
41
Vertex form for a parabola (in x):
(x-h)2=4p(y-k) Note: Focus: (h,k+p) Directrix: x=k-p
42
Quadratic in y: axis of symmetry parallel to the x-axis - Which ways can it open?
Right or Left
43
General form for a parabola (in y):
By2+Dx+Ey+F=0 x=ay2+by+c Note: B and D are nonzero. a is nonzero.
44
Vertex form for a parabola (in y):
(y-k)2=4p(x-h) Note: Focus: (h + p,k) Directrix: x=h-p
45
Vertex of a parabola:
(h,k)
46
The distance from the vertex to Focus in a parabola:
p=a/2
47
The distance from the vertex to Directrix in a parabola:
p
48
The length of the latus rectum in a parabola:
4p