Question

turning (quadratic form) " 2x^2+8x+7=0 " into vertex form

Answer 1

2x^2+8x+7 = 2(x^2 + 4x + 7/2)
Complete the square for the expression inside the parenthesis.

Answer 2

2x^2+8x+7 = 2(x^2 + 4x + 7/2) = 2{ (x+2)^2 - 4 + 7/2 } =
2{ (x+2)^2 - 1/2 } = 2(x+2)^2 - 1

2(x+2)^2 - 1 is the vertex form. The vertex of the parabola is is at (-2,-1)

Answer 3

:D that was my answer i just solved it!
thank you so much!!

Answer 4

You are welcome.