81-x^2=x^2+4x+11

Simple and best practice solution for 81-x^2=x^2+4x+11 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 81-x^2=x^2+4x+11 equation:


Simplifying
81 + -1x2 = x2 + 4x + 11

Reorder the terms:
81 + -1x2 = 11 + 4x + x2

Solving
81 + -1x2 = 11 + 4x + x2

Solving for variable 'x'.

Reorder the terms:
81 + -11 + -4x + -1x2 + -1x2 = 11 + 4x + x2 + -11 + -4x + -1x2

Combine like terms: 81 + -11 = 70
70 + -4x + -1x2 + -1x2 = 11 + 4x + x2 + -11 + -4x + -1x2

Combine like terms: -1x2 + -1x2 = -2x2
70 + -4x + -2x2 = 11 + 4x + x2 + -11 + -4x + -1x2

Reorder the terms:
70 + -4x + -2x2 = 11 + -11 + 4x + -4x + x2 + -1x2

Combine like terms: 11 + -11 = 0
70 + -4x + -2x2 = 0 + 4x + -4x + x2 + -1x2
70 + -4x + -2x2 = 4x + -4x + x2 + -1x2

Combine like terms: 4x + -4x = 0
70 + -4x + -2x2 = 0 + x2 + -1x2
70 + -4x + -2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
70 + -4x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(35 + -2x + -1x2) = 0

Factor a trinomial.
2((5 + -1x)(7 + x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Subproblem 2

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Solution

x = {5, -7}

See similar equations:

| -6(a+4)-7a=-128 | | x^4+4x^2-60x+225=0 | | -2.3=1.4+0.6 | | 4(x+4)+y(x+4)= | | 8-7a=16-3a | | -9u=-18 | | (5+7p)(2)= | | 3xy-10=14 | | (2-x)(1+x)(3-x)(x-5)=0 | | X/67 | | -5k+7+8=-5k+15 | | p/3-19 | | 121.1=-19.3-4x | | 9n^2=-10n+9 | | -u/4=24 | | p^2+10p+c=0 | | 3x(-4)-4x-5/1 | | 5x-3(2x-4)=2(x-1)+4 | | 7j=16j-18 | | 7=y+9 | | p^2-5p+c=0 | | 3n-8=n+15 | | z^2+18z+c=0 | | 144=36m^2 | | 5+4x-4=-23 | | 8x^2+16x+76=0 | | 10x+20=5x+40 | | 6(1+4m)=-9(6m-3) | | 3/(5-2x)=7/2 | | 0=16t^2+64t+512 | | (10x/2x-3)-5x/1 | | 3x+9+7y+3+15z-9=180 |

Equations solver categories