How do you multiply #(- 4x - 5) ( - 6x - 4)#?

1 Answer
Mar 22, 2018

Answer:

#(-4x-5)(-6x-4)=color(blue)(24x^2 + 46x + 20#

Explanation:

Multiply (Expand):

#(-4x-5)(-6x-4)#

Use the FOIL method.

https://www.ipracticemath.com/learn/algebra/foil-method-of-binomial-multiplication
https://en.wikipedia.org/wiki/FOIL_method

#(-4x-5)(-6x-4)=#

#(-4x*-6x) + (-4x*-4) + (-5*-6x) + (-5*-4)=#

#24x^2+16x+30x+20#

Collect like terms.

#24x^2 + (16x+30x) + 20#

Combine like terms.

#24x^2 + 46x + 20#