How do I find the cube of #(2 x + 5)#?

1 Answer
Apr 1, 2018

Answer:

#8x^3+65x^2+150x+125#

Explanation:

#(2x+5)# cubed = #(2x+5)^3#

#(2x+5)^3 = (2x+5)(2x+5)(2x+5)#

First, do #(2x+5)(2x+5)=4x^2+20x+25#

Now do the second part: #(4x^2+20x+25)(2x+5)#

#8x^3+65x^2+150x+125#