Question

Re-write the quadratic function below in standard form y=3(x+4)(x+1)

Answer 1

y = 3x² + 15x + 12

Explanation:

A quadratic function in standard form is

y = ax² + bx + c ( a ≠ 0 )

Given

y = 3(x + 4)(x + 1) ← expand the factors using FOIL

= 3(x² + 5x + 4) ← distribute parenthesis by 3

= 3x² + 15x + 12