Answer:x=±1
Step-by-step explanation:
1 Subtract 1818 from both sides.
2{x}^{2}=20-182x
2
=20−18
2 Simplify 20-1820−18 to 22.
2{x}^{2}=22x
2
=2
3 Divide both sides by 22.
{x}^{2}=1x
2
=1
4 Take the square root of both sides.
x=\pm \sqrt{1}x=±√
1
5 Simplify \sqrt{1}√
1
to 11.
x=\pm 1x=±1
Done
