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Factor and solve x^2-4x=5

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Answer:

Explanation:

bring 5 to the left hand side and the equation will becomes x^2-4x-5=0

then lets see for common factors and -5 and +1 are suitable since when you multiply them you get -5 and if you add them it becomes -4 so

x^2+x-5x-5=0

x(x+1)-5(x+1)=0

take (x+1) common

(x-5)(x+1)=0

x-5=0

x=0+5

x=+5

x+1=0

x=0-1

x=-1

so here are the two solutions

User Sarnold
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