2x^2-8=90

Simple and best practice solution for 2x^2-8=90 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2x^2-8=90 equation: 


Simplifying
2x2 + -8 = 90

Reorder the terms:
-8 + 2x2 = 90

Solving
-8 + 2x2 = 90

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '8' to each side of the equation.
-8 + 8 + 2x2 = 90 + 8

Combine like terms: -8 + 8 = 0
0 + 2x2 = 90 + 8
2x2 = 90 + 8

Combine like terms: 90 + 8 = 98
2x2 = 98

Divide each side by '2'.
x2 = 49

Simplifying
x2 = 49

Take the square root of each side:
x = {-7, 7}

See similar equations:

| 6x+10=3x+40 | | -3x+2=5x-14 | | 3x^4+3x^5=3 | | x-15=-45 | | 2+4(4-x)=6(7x+4) | | (4a+12)=(3a+32) | | 2x+5=12+x | | k*z^2+10z+2=0 | | X-2+X+X=27 | | 5x-15=70 | | 2p-1=12 | | 4.35-2.7x=9.3x+2.1 | | 5.8x+3.1=4 | | 3x-8(11x-3)=74 | | (3/7)x+5=8 | | -10x=12-12x | | (1/4)r-(1/16)+(1/2)r=(1/2)+r | | -5x=60+7x | | 4-7s=3s+4 | | -6=(x/8)+4 | | -8x=81+1x | | -4x=32+12x | | n-2(n-5)=4n | | z^3+3z^2+7z+21= | | 3x+2+6y=0 | | 20x^2+25x+5=0 | | 2h=3k-5 | | 49t^2+42t+9= | | ab^5+1000ab^2= | | -10t^5+15t^4-9t^3= | | 3x+3=52 | | 4x=1.6 |

Equations solver categories