x^2-1=20

Simple and best practice solution for x^2-1=20 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 x^2-1=20 equation: 


Simplifying
x2 + -1 = 20

Reorder the terms:
-1 + x2 = 20

Solving
-1 + x2 = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + x2 = 20 + 1

Combine like terms: -1 + 1 = 0
0 + x2 = 20 + 1
x2 = 20 + 1

Combine like terms: 20 + 1 = 21
x2 = 21

Simplifying
x2 = 21

Take the square root of each side:
x = {-4.582575695, 4.582575695}

See similar equations:

| y+(-24)=-10 | | x+(x*0.2)=977568 | | 0.25t+8=6 | | 11.1c-2.4=-8.3+6.4 | | 18-4=x+5 | | 3(x+3)+23= | | -51-11x=25-7x | | -c=54-65 | | -2*-2-5*3-3*-4*-4= | | 2m=-6*3-5 | | -x^3+2x^2+4x+8= | | 76=25(3y+19) | | 2m=-6*2-5 | | 5x+4=2x+21 | | 2m=-6*1-5 | | 7x-2=34 | | 32x+4=3 | | x^2-2x+96=180 | | 6+14=10y+15-9y | | 2x^16=0 | | y+7/3=-5 | | S+-9=7 | | 6m=3(5m+15) | | 8+4(2-1)= | | 10x-19=11x+10 | | 3c+12=5c+10.74 | | 16x-29=13x+7 | | b^2-bu-4b+4u=0 | | X^3+13X=116 | | 4x-24+7=11 | | 1-5p+p=13 | | x^2-28=12 |

Equations solver categories