Question

x.(6+x)=4²
valor de x​

Answer 1

Resposta:

OLÁ

VAMOS A SUA PERGUNTA:⇒⇒

$\sf x\cdot(6+x)=4^2$

$\sf 6x+x^2=4^2$

$\sf 6x+x^2=16$

$\sf x^2+6x=16$

$\sf x^2+6x+3^2=16+3^2$

$\sf x^2+6x+9=16+9$

$\sf x^2+6x+9=25$

$\sf (x+3)^2=25$

$\sf \sqrt{(x+3)^2} =\sqrt{25}$

$\sf x+3=5\\x+3=-5$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \red{x=2}}}}\ \checkmark\\\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \blue{x=-8}}}}\ \checkmark$←←⊇⊇↑↑∪∪ RESPOSTA.

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