Quadratic functions Flashcards
1
Q
Factorise 3x^2-14x+8
A
(X…..)(3x…..)
we need x in one bracket and 3x in other.
Think of two numbers we mulitply together to get 8, both must be negative as its plus 8 and -14,
(3x - 2)(x-4)
2
Q
Factorise x^2 + 4x-5
A
(x-1)(x+5)
two numbers we add together to get +4 and multiply together to get -1.
3
Q
quadratic functions formula
A
y = ax^2+bx+c where a does not = 0
4
Q
What is the root of a quadratic graph
A
The x-intercept
5
Q
What is the parabola of a quadratic graph
A
The shape of the quadratic graph.
6
Q
what is the minimum point of a quadratic graph
A
The turning point. This can sometimes be seen using the line of symmetry.
7
Q
if a <0 what is the shape of a quadratic graph
A
the parabola is an upside down U shape.
8
Q
A
