What’s the answer to x2-4x=5 if you factor it?

1 Answer
rea · Stefan V.
Mar 12, 2018

#(x-5)(x+1)#

Explanation:

Subtract #5# from both sides. You then have:

#x^2-4x-5 = 0#

Then, what two numbers can you multiply to get #-5# and add to get #-4#? The answer is #-5# and #1#. So, make them into factors.

Your answer is then

#(x-5)(x+1)#

FOIL it and you get to what you originally had.

Related questions
See all questions in Factorization of Quadratic Expressions
Impact of this question
1418 views around the world
You can reuse this answer
Creative Commons License