How do you foil $(4x-9)(3x+11)$ ?

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Answer 1 · 2015-09-09T06:16:50

$12x^2-23x-9$

$(4x-9)(3x+11)$
$4x xx 3x=12x^2$
$-9 xx 3x = -27x$
$4x xx 1 =4x$
$-9 xx 1 = -9$
$12x^2-27x+4x-9$
$12x^2-23x-9$

How do you foil (4x-9)(3x+11)(4x-9)(3x+11)?