How do you factor completely: #5x^2 + 20x#?

1 Answer
Apr 24, 2018

Answer:

#5x(x+4)#

Explanation:

The first thing you should always do whilst factoring is find a common factor. In this case, it would be 5x as it divides into both of these.
Then take each variable and divide it by your factor.
#(5x^2) / (5x) = x#

#(20x)/(5x) = 4#

Then just put your factor on the outside of your bracket and the two other variables inside and you've got your answer!
#5x#(Your factor) #(x+4)# (The two other variables)
#5x(x+4)#