6.1 Areas Between Curves/18

${\begin{aligned}&\color {red}\mathbf {y=8-x^{2}} &\color {royalblue}\mathbf {y=x^{2}} \\&x=-3&x=3\\\end{aligned}}$

${\begin{aligned}8-x^{2}&=x^{2}\\8&=2x^{2}\\4&=x^{2}\\\end{aligned}}$

$x=\pm 2$