salina9132p9xfjh salina9132p9xfjh

07-06-2018
Mathematics

contestada

what is the the only solution of 2x^2+8x=x^2-16

Respuesta :

1233481 1233481

07-06-2018

I got -4 as the solution

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mkryukova19 mkryukova19

07-06-2018

2x² + 8x = x² - 16
2x² - x²+8x + 16 = 0
x²+8x+16 = 0
x² + 2*4x + 4² = 0
(x+4)² = 0
x+4 = 0
x= - 4

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