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29-11-2019
Mathematics

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When 8 is subtracted from the square of a number, the result is 7 times the number. Find the negative solution.

Respuesta :

bsit39123 bsit39123

29-11-2019

Answer:

Step-by-step explanation:

X2 -8 = 7x

X2 -7x -8 = 0

X2 -8x+x -8=0

X(x-8)+1(x-8) =0

(X-8)(x+1)=0

X-8=0 or x+1=0

X=8 or x=-1

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