Question

Como faz esse? x²+8×+15=0

Answer 1

Resposta:

$x^2 +8* +15=0\\\\x^2+8+15-8=0-8\\\\x^2+15=-8\\\\x^2+15-15=-8-15\\\\x^2=-23\\\\x=\sqrt{-23}\\\\\:x=-\sqrt{-23}\\\\x=\sqrt{23}i\\\\\:x=-\sqrt{23}i$