Question

Write the expression (4X -2)•6(2X +7)in the standard form of a quadratic expression

Answer 1

48x² + 144x − 84

Explanation:

A= 48

B= 144

C= -84

(The variables DO NOT have to be added, only the coefficients and the constant).

Hope this helps :)

Answer 2

(4x - 2) x (12x +42) (I distributed the 6 over the 2x and the 7)

Using the FOIL method
First terms (in each parenthesis) 4x times 12 x = 48x²
Outer terms 4x times 42 = 168x
Inner terms -2 times 12 x = -24x
Last terms -2 times 42 = -84

So we have 48x² + 168x + 168x - 24x -84
Finally combine like terms:

48x² + 144x - 84 There's your quadratic expression