Question

What are the solutions to he quadratic equation 3x^2+15-18=0

Answer 1

$3 {x}^{2} + 15 - 18 = 0 \\ {3x}^{2} - 3 = 0 \\ {x}^{2} - 1 = 0 \\ {x}^{2} = 1$
either x= +1
or x= -1