7x-x^2=5

Simple and best practice solution for 7x-x^2=5 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 7x-x^2=5 equation:


Simplifying
7x + -1x2 = 5

Solving
7x + -1x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + 7x + -1x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + 7x + -1x2 = 0

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

Divide each side by '-1'.
5 + -7x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -7x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -7x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -7x + x2 = 0 + -5
-7x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-7x + x2 = -5

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -5 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -5 + 12.25

Combine like terms: -5 + 12.25 = 7.25
12.25 + -7x + x2 = 7.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 7.25

Calculate the square root of the right side: 2.692582404

Break this problem into two subproblems by setting 
(x + -3.5) equal to 2.692582404 and -2.692582404.

Subproblem 1

x + -3.5 = 2.692582404 Simplifying x + -3.5 = 2.692582404 Reorder the terms: -3.5 + x = 2.692582404 Solving -3.5 + x = 2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 2.692582404 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 2.692582404 + 3.5 x = 2.692582404 + 3.5 Combine like terms: 2.692582404 + 3.5 = 6.192582404 x = 6.192582404 Simplifying x = 6.192582404

Subproblem 2

x + -3.5 = -2.692582404 Simplifying x + -3.5 = -2.692582404 Reorder the terms: -3.5 + x = -2.692582404 Solving -3.5 + x = -2.692582404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -2.692582404 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -2.692582404 + 3.5 x = -2.692582404 + 3.5 Combine like terms: -2.692582404 + 3.5 = 0.807417596 x = 0.807417596 Simplifying x = 0.807417596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.192582404, 0.807417596}

See similar equations:

| (X-1)(x-6)=36 | | -0.95-10.5x=8.35-4.1x+14.38 | | -18.6x+1.11=7.76-17.9x | | x-0.8x=16 | | 6+2x=4(x+3)-3(x-4) | | 4x+1=3(x-1)+6 | | (M/2)=9 | | -5=-10+x | | -8.32-15.9x=-10.7x | | 6x+10=3y | | 8.5x+14.02=-7.6x-14.48+14.2x | | 100-30-50= | | 4k^2-20k+1=0 | | 4=-8-f | | (1/2)N=8 | | 12+16x-14=15x+17 | | 4=2(1.5c-4) | | -17x-14=-16x | | 14x+1.5y=930 | | 17x+14=-4+16x | | 6(4p-12)-4p=28 | | 7y-10+3y+10=20 | | -4x=8-2x | | 7x+2=6(x-3)+8 | | 5(2p+0.8)=8 | | 2x+9forx=3 | | -[3z^2+6x-(2z^2-9z)]+[(6z^2-[5z-z^2])+5z^2]= | | a=zv+v | | 60-x-7=19 | | y=lx-5l-11 | | -8-2x=6x+8-4x | | 2x-10=10+10-4x |

Equations solver categories