4x+x^2=75

Simple and best practice solution for 4x+x^2=75 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 4x+x^2=75 equation:


Simplifying
4x + x2 = 75

Solving
4x + x2 = 75

Solving for variable 'x'.

Reorder the terms:
-75 + 4x + x2 = 75 + -75

Combine like terms: 75 + -75 = 0
-75 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + 4x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + 4x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + 4x + x2 = 0 + 75
4x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
4x + x2 = 75

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 75 + 4

Reorder the terms:
4 + 4x + x2 = 75 + 4

Combine like terms: 75 + 4 = 79
4 + 4x + x2 = 79

Factor a perfect square on the left side:
(x + 2)(x + 2) = 79

Calculate the square root of the right side: 8.888194417

Break this problem into two subproblems by setting 
(x + 2) equal to 8.888194417 and -8.888194417.

Subproblem 1

x + 2 = 8.888194417 Simplifying x + 2 = 8.888194417 Reorder the terms: 2 + x = 8.888194417 Solving 2 + x = 8.888194417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 8.888194417 + -2 Combine like terms: 2 + -2 = 0 0 + x = 8.888194417 + -2 x = 8.888194417 + -2 Combine like terms: 8.888194417 + -2 = 6.888194417 x = 6.888194417 Simplifying x = 6.888194417

Subproblem 2

x + 2 = -8.888194417 Simplifying x + 2 = -8.888194417 Reorder the terms: 2 + x = -8.888194417 Solving 2 + x = -8.888194417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -8.888194417 + -2 Combine like terms: 2 + -2 = 0 0 + x = -8.888194417 + -2 x = -8.888194417 + -2 Combine like terms: -8.888194417 + -2 = -10.888194417 x = -10.888194417 Simplifying x = -10.888194417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.888194417, -10.888194417}

See similar equations:

| (-4)x(-4)x(-4)x(-4)=64 | | 13g+2(4k-g)= | | 1+5/3y/6/2x+5/y | | 4/x-3=2x/x+3 | | 2=10c-4(2c-9) | | -31(-2)-20+3(-2)+2=38 | | o+o=2 | | 3.14-123=q | | -86=2(6x-7) | | 2x+y=7x-3 | | 80-g=7(g+6) | | h^2+18hj+17j^2=0 | | 72.1-2.74= | | 128.79=2.25h+72.54 | | h^3+18hj+17j^2=0 | | 1+p+o+o+p=2 | | n=5p+7 | | 7w+w-15=17 | | W/-2-7=-5 | | 88=-4(4n-7)+4n | | -5(-2)-10-5(-2)-2=8 | | 8x-5y=2 | | 10-10+10-2=x | | p^2-10pq+16q^2=0 | | a-1=-1 | | 0-10y=50 | | 6=hj+kforj | | x+2x+13=82 | | 14-3x-7=23 | | (2-6)x(2-6)x(2-6)=64 | | 11/2-2/3z=2 | | 0=x^2+x+9 |

Equations solver categories