Question

5x²+20x = 18x + 720 +2x​

Answer 1

Explicación paso a paso:

$5 {x}^{2} + 20x = 18x + 720 + 2x$

$5 {x}^{2} + 20x =20x + 720$

$5 {x}^{2} + 20x - 20x = 720$

$5 {x}^{2} = 720$

${x}^{2} = 720 \div 5$

${x}^{2} = 144$

$x = \sqrt{144}$

$x = 12$