# Help with College Algebra Question:?

Hi-

I am need help with a quick College Algebra Question. Thanks so much for the help in advance.

Expand.

(4x + 5)^3

Relevance

This is definitely not linear algebra.

Just foil/distribute.

64x^3+240x^2+300x+125

• Okay, so (4x + 5)^3 = (4x + 5)*(4x + 5)*(4x + 5). Using the FOIL method (first, outside, inside, last), you can expand (4x + 5)*(4x + 5) to 16x^2 + 40x + 25. Then, you have to multiply this entire expression by 4x + 5, which might seem complicated, but it's really not. (4x + 5) * (16x^2 + 40x + 25) = 64x^3 + 80x^2 + 160x^2 + 200x + 100x + 125. This simplifies to 64x^3 + 240x^2 + 300x + 125. That is the expanded answer. I hope this helps!

Source(s): I have taken Algebra before.
• college Algebra is the spawn of devil. in basic terms kidding, whether it does characteristic purposes, and Logarithms so have relaxing with those. each and every thing else is in basic terms equipped upon what you discovered in algebra so be arranged for pre-cal issues. I quite quite quite propose which you learn college algebra till now you get into the type. some parts of it truly is going to be certain people hit a brick wall an fail out of the type.

• (4x+5)(4x+5)(4x+5)

(16x^2+10x+25)(4x+5)

64x^3+40x^2+100x+80x^2+50x+125

64x^3+120x^2+150x+125