What is the axis of symmetry of h(x)=5x^2+40x+64

The axis of symmetry of a parabola is the vertical line passing through its vertex. Given a parabola , the vertex x-coordinate can be found using

In your case, the formula leads to

So, this parabola is symmetric with respect to the line  

answer: 43/157

this is the answer and if you try to prove me wrong your a meanie

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form