7-x^2-12x=0

Simple and best practice solution for 7-x^2-12x=0 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 7-x^2-12x=0 equation:


Simplifying
7 + -1x2 + -12x = 0

Reorder the terms:
7 + -12x + -1x2 = 0

Solving
7 + -12x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-7 + 12x + x2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + 12x + 7 + x2 = 0 + 7

Reorder the terms:
-7 + 7 + 12x + x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 12x + x2 = 0 + 7
12x + x2 = 0 + 7

Combine like terms: 0 + 7 = 7
12x + x2 = 7

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 7 + 36

Reorder the terms:
36 + 12x + x2 = 7 + 36

Combine like terms: 7 + 36 = 43
36 + 12x + x2 = 43

Factor a perfect square on the left side:
(x + 6)(x + 6) = 43

Calculate the square root of the right side: 6.557438524

Break this problem into two subproblems by setting 
(x + 6) equal to 6.557438524 and -6.557438524.

Subproblem 1

x + 6 = 6.557438524 Simplifying x + 6 = 6.557438524 Reorder the terms: 6 + x = 6.557438524 Solving 6 + x = 6.557438524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 6.557438524 + -6 Combine like terms: 6 + -6 = 0 0 + x = 6.557438524 + -6 x = 6.557438524 + -6 Combine like terms: 6.557438524 + -6 = 0.557438524 x = 0.557438524 Simplifying x = 0.557438524

Subproblem 2

x + 6 = -6.557438524 Simplifying x + 6 = -6.557438524 Reorder the terms: 6 + x = -6.557438524 Solving 6 + x = -6.557438524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -6.557438524 + -6 Combine like terms: 6 + -6 = 0 0 + x = -6.557438524 + -6 x = -6.557438524 + -6 Combine like terms: -6.557438524 + -6 = -12.557438524 x = -12.557438524 Simplifying x = -12.557438524

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.557438524, -12.557438524}

See similar equations:

| (-a-3b+2)5ab= | | k+14=-6 | | 8+5t=6 | | 6(x-5)+5x=-3(x+10)+14x | | 1/2(16z+12)-1=7(z-4) | | 11(v+1)-2v=3(3v+1)-4 | | Y=-2/315x^2+4x | | 3p+2=7 | | 7a-2/3=4 | | -6y+48=3(4y-8) | | 5y-10=4-3y | | V^2=-3-4v | | 10=r/3+8 | | -11p-6(5-3p)=4(p-3)-6 | | 0.7-4y=1.74 | | 5m-3m+1=m-7 | | 49x^2-35x+4=0 | | -8(x-6)-(-2x)= | | 10=r^3+8 | | -2b-4=-3b | | 3x+63=9(x+7)-6x | | 7.5+8.8x=x+27.3 | | .43x+.57y=2.5 | | 2c+4+7=11 | | 5-y+(6-y)-(5-y)=0 | | -8(x-6)-(-2)= | | 3+x=7x+63 | | y(y-6)3-27(y-6)2=0 | | 6(8a)48a= | | -3(2x-10)= | | 1+x-4x-6=10 | | 2/7v+4/5=6/5v-4/5 |

Equations solver categories