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How do you factor #x^ { 2} - 20x = - 125#?

1 Answer

Dec 17, 2016

#(x+5)(x-20)=0#

Explanation:

#x^2-20x=-125#

#->x^2-20x+125=0#
#->x^2+5x-20x+125=0# (See this video for how this happened - Factoring quadratics)
#->x(x+5)-20(x+5)=0#
#->(x+5)(x-20)=0#

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