9x^2-4=77

Simple and best practice solution for 9x^2-4=77 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 9x^2-4=77 equation: 


Simplifying
9x2 + -4 = 77

Reorder the terms:
-4 + 9x2 = 77

Solving
-4 + 9x2 = 77

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 9x2 = 77 + 4

Combine like terms: -4 + 4 = 0
0 + 9x2 = 77 + 4
9x2 = 77 + 4

Combine like terms: 77 + 4 = 81
9x2 = 81

Divide each side by '9'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}

See similar equations:

| 8h+9=9h | | 4x-12=2w+3 | | 19-x=4x-26 | | 5(x-2.7)=8 | | 74-5x=5x+34 | | 121p^2=1 | | 6+5u=7u-8 | | M^2-22=0 | | -3.3x+4=-3.3x | | (16+2x)*(10+2x)=20*14 | | W^2+24=88 | | 10j-5=-3-9+9j | | -2(3s-2)-4=-2(6s+9)-2 | | 4x+103=181-9x | | (3x+2)+(5x-4)=360 | | 30=-2x-6 | | X^2+60=1600 | | -1(6y-1)=-5y+3 | | 8x+55=70-7x | | 14-x=8x-52 | | 8x-3=82 | | -9r=-10r-2 | | 5n-20=4n+24 | | 4f^2-36=0 | | G^2-21=100 | | -12x+21y=1 | | 1-3c=-2c-9 | | -8+5s=6s | | 2a+5=22 | | -5+8p=7p+3 | | 9u^2+81=0 | | 9c+5-2c-3= |

Equations solver categories