-3x^2-21=45

Simple and best practice solution for -3x^2-21=45 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^2-21=45 equation:


Simplifying
-3x2 + -21 = 45

Reorder the terms:
-21 + -3x2 = 45

Solving
-21 + -3x2 = 45

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -3x2 = 45 + 21

Combine like terms: -21 + 21 = 0
0 + -3x2 = 45 + 21
-3x2 = 45 + 21

Combine like terms: 45 + 21 = 66
-3x2 = 66

Divide each side by '-3'.
x2 = -22

Simplifying
x2 = -22

Reorder the terms:
22 + x2 = -22 + 22

Combine like terms: -22 + 22 = 0
22 + x2 = 0

The solution to this equation could not be determined.

See similar equations:

| v-0.5=0.2 | | (7-v)(5v-3)=0 | | =3c^2x^3-9cx-6c | | 5x-20=-40x-213 | | (3x+4)+(4x+2)=90 | | 4x=12+x | | -8-4x=36 | | B=(x+1)*(2x-1)*(x+1)*(x-5) | | 3x^2+24x-36=0 | | x^2-15x+225=0 | | -v+249=161 | | 2=-2(v+1) | | -6(5x+8)-3x=-4(6x-1)-7 | | 2.8x+4.1(2x)=3190 | | 180=67-x | | (11-8x)(3x+7)=0 | | 6x+4x=8 | | 2+5(2+4a)=8a+6(a-3) | | 3x+38=38x-62 | | 5.30x+9.90(143-x)=1038.50 | | 181=y+132 | | 10x+5=3x+5+7x | | 6-4(n-1)=-7n+25 | | z=5+6i | | -102=-6(6p-1) | | 9-7x=58 | | 4x^3+36x=0 | | 86=2b-5(2-6b) | | 6d-5c-1d= | | 54-y=251 | | 6-3n=-2-7n | | 2(5x+6)=82 |

Equations solver categories