Question

5x²+4=49 me ajuda tbm ?

Answer 1

5x² + 4 = 49
5x² = 49 - 4
5x² = 45
x² = 45 / 5
x² = 9
x² = √9 =
x = $\boxed{3}$

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Answer 2

$5x^{2}+4=49 \\ 5x^{2}=49-4 \\ 5x^{2}=45 \\ x^{2}= \frac{45}{5} \\ x^{2}=9 \\ x= \sqrt{9} \\ x=3$

Verificando:

$5.3^{2}+4=49 \\ 5.9+4=49 \\ 45+4=49$

^^