How do you foil (-4x+5)(-2x-3)?

2 Answers
Jun 27, 2018

=8x^2+2x-15

Explanation:

=(-4x xx-2x)+(-4x xx-3)+(5xx-2x)+(5xx-3)
=8x^2+12x-10x-15
=8x^2+2x-15

Jun 27, 2018

8x^2 + 2x - 15

Explanation:

Here is a helpful image for FOIL:

![https://studyfaq.com/blog/foil-calculator](useruploads.socratic.org)

(−4x+5)(−2x−3)

FIRSTS:
-4x xx -2x rarr color(blue)(8x^2

OUTERS:
-4x xx -3 rarr color(purple)(12x

INNERS:
5 xx -2x rarr color(brown)(-10x)

LASTS:
5 xx -3 rarr color(green)(-15

Now put them all together and simplify:

8x^2 + 12x - 10x - 15

8x^2 + 2x - 15