Question

preciso de ajuda : logx+1 (x² + 7) = 2

Answer 1

(x+1)²=x²+7
x² +2x +1 =x² +7   cancela o x² nos dois lados
2x+1 =7
2x=6
x=3

Answer 2

$\mathsf{\ell og_{x+1}(x^2+7)=2}\\\\\mathsf{(x+1)^2=x^2+7}\\\mathsf{\diagup\!\!\!x^2+2x+1=\diagup\!\!\!x^2+7}\\\mathsf{2x=7-1}\\\mathsf{2x=6}\\\\\mathsf{x=\dfrac{6}{2}}\\\\\boxed{\mathsf{x=3}}$

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