Question

(x+3) ^2 + 4 = 40
$4 ] \sqrt{15x - 9} + 2 = 5$
(2x+7)^3+31=4​

Answer 1

Respuesta:

${(x + 3)}^{2} + 4 = 40 \\ {(x + 3)}^{2} = 36 \\ x + 3 = \sqrt{36} \\ x = \sqrt{36} - 3 \\ x = 6 - 3 \\ x = 3$

$\sqrt{15x - 9} + 2 = 5 \\ \sqrt{15x - 9} = 3 \\ {(\sqrt{15x - 9})}^{2} = {3}^{2} \\ 15x - 9 = 9 \\ 15x = 18 \\ x = \frac{15}{18} \\ x = \frac{5}{6}$

$(2x+7)^3+31=4 \\ (2x+7)^3 = 4 - 31 \\ (2x+7)^3 = - 27 \\ \sqrt[3]{((2x+7)^3)} = \sqrt[ 3]{ - 27} \\ 2x + 7 = - 3 \\ 2x = - 10 \\ x = \frac{ - 10}{2} \\ x = - 5$