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x∈R  34+15(x+3)²=(-13)²

Răspuns :

Mariusdarius07ask


34+15(x+3)²=(-13)²

34+15(x²+6x=9)=169

34+15x²+90x+135=169

15x(x+6)=169-34-135

15x(x+6)=0

⇒x=0
15(x+3)^2=135
(x+3)^2=9
|x+3|=3
x+3 apartine {3;-3}
x apartine { 0 ; -6}

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