Question

resolva a questão
-3x2+7=0

Answer 1

-3x2+7=0
-3.2+7=x
-6+7=x
1=x

Answer 2

$- 3 {x}^{2} + 7 = 0 \\ - 3 {x}^{2} = - 7 ( - 1) \\ 3 {x}^{2} = 7 \\ {x}^{2} = \frac{7}{3} \\ x = \sqrt{2.3} \\ x = 1.52$