x^2-7=9

Simple and best practice solution for x^2-7=9 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^2-7=9 equation: 


Simplifying
x2 + -7 = 9

Reorder the terms:
-7 + x2 = 9

Solving
-7 + x2 = 9

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + x2 = 9 + 7

Combine like terms: -7 + 7 = 0
0 + x2 = 9 + 7
x2 = 9 + 7

Combine like terms: 9 + 7 = 16
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}

See similar equations:

| 2(k-5)+3=9 | | 8x^2-20x-48=0 | | x^9+14=384 | | 9x^3-324=0 | | y^3+3y^2-4y-12=0 | | 9x+14=384 | | 3r+7s=11 | | x^2+x-40=2 | | 2x^2-250+5000=0 | | 10(p+4)-6p= | | 5y-20=x | | x+1.5x=17 | | 6=11-v | | 497+L=562 | | x^2-3x-15=-5 | | x(4x+7)=0 | | 2y+x=5 | | -19c+20c=-13 | | x-2-2-22-2-2-2=2 | | 7p-5(7+p)=-35 | | 3xn+19=37 | | 12-y=x | | 10x-7=8x+9 | | 6f^2+7f-20=0 | | (2x+1)(x-12)=0 | | 729=49x(36) | | (3x+2)(3x-2)=0 | | f+9y+p=h | | 2a^2+5a-7=0 | | 4x^2-12x+5= | | x-15=1-7x | | b^3+4b^2+4b=0 |

Equations solver categories