audigarcia audigarcia

09-03-2017
Mathematics

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how many solutions does the equation x^2-9x=-8 have?

Respuesta :

09-03-2017

x^2-9x=-8
x^2-9x+8=-8+8
x^2-9x+8=0
(x-8)(x-1)=0

x-8=0
x-8+8=0+8
x=8

x-1=0
x-1+1=0+1
x=1

There are 2 solutions, which are 1 and 8

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