Question

Quanto vale x... (5+x.(5+x)=49

Answer 1

(5+x) (5+x) = 49
25 + 10x + x² =49
x² + 10x -24 = 0
Soma = -10
Produto = -24
x' = -12
x'' = +2

Answer 2

(x+5)(x+5)=49
x²+10x+25=49
x²+10x-24=0
x'=-12
x=2
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