Unit 9 Flashcards
1
Q
Q1 - factorise x²-12x+27
A
(x-3)(x-9)
2
Q
Q1 (ii)- solve the equatopn x²-12x+27=0
A
x=9 or x=3 (quadratic formula)
3
Q
Q1 b - factories y²-100
A
(y-10)(y+10)
4
Q
q2 Expand and simplify (y+2)(y+5)
A
y²+7y+10
5
Q
Q2 b - Factorise e²+e-12
A
(e+4)(e-3)
6
Q
Q2 c - Solve 3x²-x-1=0
A
x=0.77 or x-0.43
7
Q
Q3 solve by factorising the equation
A
x=-3
8
Q
Q4 the expression x²-8x+21 can be written in the form (x-a)² + b for all values of x
Find the value of a and b
A
a=4 b=5
9
Q
Q4 find the point of M
A
(4,5)
10
Q
Q5 Solve the simultaneous equations
A
4x+y=25
x-3y=16
x=7
y=-3
11
Q
Q5 Solve the equations
A
(x, y) = (6, 0) or (3.6, -4.8)
12
Q
Q7
A
A = £8.50
C=£4.50
13
Q
Q8 Solve 3x²-12x-3
Give your solutions in surd form
A
14
Q
-2
A
15
Q
Solve the inequality 8x-3≥6x+4
A
x≥3.5
