Part of the graph of the function f(x) = (x - 1)(x + 7) is shown
below.
Which statements about the function are true? Select three
options.
1v1
The vertex of the function is at (-4-15).

- 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

could

step-by-step explanation:

u send me a picture of ur work

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7