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

1 answer:

3 0

(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

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