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(X+1) totul la a doua egal cu 49
Ofer coroanaaa!!


Răspuns :


[tex]\it (x+1)^2=49 \Leftrightarrow \sqrt{(x+1)^2} = \sqrt{49} \Leftrightarrow |x+1|=7 \Leftrightarrow \\\;\\ \Leftrightarrow x+1=\pm7 \Leftrightarrow x+1\in\{-7,\ 7\}|_{-1} \Leftrightarrow x\in\{-8,\ 6\}[/tex]


(x+1)²=49
x+1=-7
x+1=+7
x=-8
x=6