How do you factor x^2+2x-99?

1 Answer
Kushagra
May 6, 2018

First... we need to split the middle term

Video credits: CheshireMath

So we can see that #99=11*9# and #11-9=2#
Implement it
#x^2-9x+11x-99#
You can also do it the other way around, i.e. #x^2+11x-9x999# and factorize it this way... but I'm gonna do it like that

Factorize
#x(x-9)+11(x-9)#
You get
#color(red)((x+11)(x-9)#

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