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How do you solve #x^2 – 9x = -20# by factoring?

1 Answer

Oct 1, 2015

#x=4# or #x=5#

Explanation:

#x^2-9x=-20#

#rarrcolor(white)("XXX")x^2-9x+20=0#

#rarrcolor(white)("XXX")(x-4)(x-5) =0#

#rarrcolor(white)("XXX")(x-4)=0# or #color(white)("XX")(x-5)=0#

#rarrcolor(white)("XXX")x=4color(white)("XXXX")# or #color(white)("XX")x=5#

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