X^2-15=3

Simple and best practice solution for X^2-15=3 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^2-15=3 equation: 


Simplifying
X2 + -15 = 3

Reorder the terms:
-15 + X2 = 3

Solving
-15 + X2 = 3

Solving for variable 'X'.

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

Add '15' to each side of the equation.
-15 + 15 + X2 = 3 + 15

Combine like terms: -15 + 15 = 0
0 + X2 = 3 + 15
X2 = 3 + 15

Combine like terms: 3 + 15 = 18
X2 = 18

Simplifying
X2 = 18

Take the square root of each side:
X = {-4.242640687, 4.242640687}

See similar equations:

| -7(p+1)+3=18-5p | | 8x-27=43+3x | | -8(3*-4)+1=15 | | 3x^2+8x=96 | | .1(x+40)-0.06(x-20)=6.4 | | 1=-8x+56 | | 4x+57=180 | | x+5x+x-5=68 | | R=(2x+10) | | M-45=10 | | 25+b=138 | | 2-23as=3 | | n-4=8.4 | | 4x-(-2x+1)=12 | | 9x^2+9xy-4y^2=0 | | -8(3*4)+1=15 | | 25y^2-29y+4= | | 136=8(8-5m)+4m | | 5q+6=49-9 | | 2*-3=-6 | | 15-4x=-11 | | 5/8-3/10= | | 3-2x=2-4x | | 4b+1=12+5b | | 0.9x=0.63 | | 1.4x^2-7x+2.8=0 | | -8+x/39=-5 | | x^2+4xy-4y^2-24=0 | | 12x-15y=70 | | 3=5(2-4n)-7 | | 15y-12x=18 | | 6x+94=2x+134 |

Equations solver categories