Completing the Square

a.

Write $5x^2 - 40x + 70$ in the form $a(x + b)^2 + c$ where $a$ , $b$ , and $c\,$ are integers.

[3]

b.

Hence, or otherwise, write down the coordinates of the turning point of the graph of $y = 5x^2 - 40x + 70$

[1]

a.

Write $5x^2 - 40x + 70$ in the form $a(x + b)^2 + c$ where $a$ , $b$ , and $c\,$ are integers.

[3]

b.

Hence, or otherwise, write down the coordinates of the turning point of the graph of $y = 5x^2 - 40x + 70$

[1]

Completing the Square Questions