If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
2x2 + 7 + -15 = 0
Reorder the terms:
7 + -15 + 2x2 = 0
Combine like terms: 7 + -15 = -8
-8 + 2x2 = 0
Solving
-8 + 2x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 2x2 = 0 + 8
Combine like terms: -8 + 8 = 0
0 + 2x2 = 0 + 8
2x2 = 0 + 8
Combine like terms: 0 + 8 = 8
2x2 = 8
Divide each side by '2'.
x2 = 4
Simplifying
x2 = 4
Take the square root of each side:
x = {-2, 2}
| -10n+3(8+9)=-6(n-4) | | -4=4+x | | -8+3a=4a-5 | | x+26=3x+7 | | 8n+2=7n+9 | | -6=48 | | 2x+8=-10-4x | | 4x-31=90 | | 1x=-9 | | 3+3m=m-5 | | 2x+3x+5x= | | 18=x+8 | | -16=2+x+8x | | 135=12x-9 | | 162=123+5c+4 | | x-4-3=-13 | | 3(2b-1)+25=4(3b+1) | | 2z+8-12z=-22 | | -8=v+3-7 | | 3b-9-8b=-9 | | 126=7(x-7) | | f+42+90=56 | | x+27=3x+7 | | 100x-1=98 | | 2x-142=x+16 | | 9x^2+16=7 | | 9d+3d+3d-4=5d | | 10x=30+5 | | 2x-23=x+77 | | -1+7b+7=-8 | | 8=z/3.1 | | 8d+4d-5d-4=4d |