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If a=3x+2 and b=-5+6x then ab equals

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5 votes

Answer:

18x² - 3x - 10

Explanation:

a = 3x + 2

b = -5 +6x

To find ab use FOIL method.

ab = (3x + 2) (-5 + 6x)

= 3x *(-5) + 3x*6x + 2*(-5) + 2*6x

= -15x + 18x² - 10 + 12x

= 18x² - 15x + 12x - 10

Combine co-efficient of like terms. Like terms have same variable with same power. Here, (-15x) and 12x are like terms.

= 18x² - 3x - 10

User Daniel Passos
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