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How do you foil #(-x-4)(4+3x)#?

1 Answer

Jess · Stefan V.

May 6, 2018

#3x^2 - 16x - 16#

Explanation:

#"F: " -x xx 4 = -4x#
#"O: " 3x xx (-x) = -3x^2#
#"I: " -4 xx 4 = -16#
#"L: " -4 xx 3x = -12x#

So

#-4x -3x^2 - 16 - 12x#

#= -3x^2 - 16x - 16#

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