3x^2-5=7

Simple and best practice solution for 3x^2-5=7 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 3x^2-5=7 equation: 


Simplifying
3x2 + -5 = 7

Reorder the terms:
-5 + 3x2 = 7

Solving
-5 + 3x2 = 7

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 3x2 = 7 + 5

Combine like terms: -5 + 5 = 0
0 + 3x2 = 7 + 5
3x2 = 7 + 5

Combine like terms: 7 + 5 = 12
3x2 = 12

Divide each side by '3'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}

See similar equations:

| -6y+4(y+2)=24 | | log[5](x+18)-log[5](x-6)=2 | | 2-3b=7+12 | | 2(x+3)+3(x-4)=5(x-1)-1 | | 1-1/4=10 | | 17-x=1/3*15+6 | | -1/4(8x+12)=2/3(18x-33) | | 1/6(5x-9)=8 | | 2(7+x)=6(x+4)-10 | | [2x+5]=11 | | 288=w+(44+w) | | 11+15w=-7+13w | | 1/4x+18=x | | 6/y-5=18/y+1 | | 2x-9y=4 | | -5(x-3)-2x=46-4(x+1) | | 3h-2(4H-5)=10-5h | | -2y+4=8y-6 | | 8k-(6k-4)=10 | | x^6-3x^4+3x^2-1=250 | | x^6-3x^4+3x^2-1=1 | | k=(5a+3)(3a-2) | | (2x^2)-27x+55=0 | | 2(3x+y)=20 | | (0.75+0.25)-(0.25/0.5) | | 37-1/3 | | .12x-.5=.25(x-4) | | x-4/5=10 | | 5-x=7/2+4x | | x^2+3x+27=180 | | 4x-8=2(x+10) | | 2x-2+3x+15-6=0 |

Equations solver categories