Question

What are the solutions to the quadratic equation: -x^2+7=0?

A. x = 7i or x = -7i
B. x= \sqrt7 or x= - \sqrt7
C. X = 7 or x = -7

Answer 1

Answer:

-x^2+7=0

=> -x^2= -7

=> x^2=7

=> x=+√7, -√7

Answer 2

Answer:

$-x^2+7=0$

${ - x}^{2} = 0 - 7$

${ - x}^{2} = - 7$

${x}^{2} = 7$

$x = \sqrt{7}$