f(x) = 4x^2 + 8x - 5 ; complete the square to find the turning point of f(x).
4x^2 + 8x - 5 = 0 4(x^2 + 2x - (5/4)) = 0 4((x + 1)^2 - 1^2 - (5/4)) = 0 4((x + 1)^2 - (9/4)) = 0 4(x + 1)^2 - 9 = 0 4(x + 1)^2 - 9 = 0 Turning point is at (-1, -9)
CK
Related Maths GCSE answers
All answers ▸There are 300 passengers on a plane, 7/20 of them are men, 30% are women, the rest are children. Work out the number of children.
Share £650 in the ratio 8:5
Whats the difference between the three main trigonometric functions?
What are "x" and "y" and why are they used?