Question

Can someone tell me how so solve this?

Solve each equation by graphing the related function. If the equation has no real number solution, write no solution.
x^2-9=0

Answer 1

Algebra answer A. x = _^+3

Answer 2

x^2−9=0
Add 9 to both sides.

x^2−9+9=0+9

x^2=9

Take square root.

x=±√9

x=3 or x=−3

Answer:
x=3 or x=−3