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x^2-4x=5

 Sep 11, 2020
 #1
avatar+781 
+2

Move everything to make it a quadratic equaation:

x^2-4x=5

x^2-4x-5=0

 

Factor and solve for x:

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

x=5, -1

 Sep 11, 2020
 #2
avatar+51 
+1

Change it into a polynomial: 

x^2-4x-5=0

Simplify from there by factoring:

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

x = 5, -1

 Sep 11, 2020

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