-x^2-7x+22=0

Simple and best practice solution for -x^2-7x+22=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 -x^2-7x+22=0 equation:


Simplifying
-1x2 + -7x + 22 = 0

Reorder the terms:
22 + -7x + -1x2 = 0

Solving
22 + -7x + -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'.
-22 + 7x + x2 = 0

Move the constant term to the right:

Add '22' to each side of the equation.
-22 + 7x + 22 + x2 = 0 + 22

Reorder the terms:
-22 + 22 + 7x + x2 = 0 + 22

Combine like terms: -22 + 22 = 0
0 + 7x + x2 = 0 + 22
7x + x2 = 0 + 22

Combine like terms: 0 + 22 = 22
7x + x2 = 22

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 = 22 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 22 + 12.25

Combine like terms: 22 + 12.25 = 34.25
12.25 + 7x + x2 = 34.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 34.25

Calculate the square root of the right side: 5.852349955

Break this problem into two subproblems by setting 
(x + 3.5) equal to 5.852349955 and -5.852349955.

Subproblem 1

x + 3.5 = 5.852349955 Simplifying x + 3.5 = 5.852349955 Reorder the terms: 3.5 + x = 5.852349955 Solving 3.5 + x = 5.852349955 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 = 5.852349955 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 5.852349955 + -3.5 x = 5.852349955 + -3.5 Combine like terms: 5.852349955 + -3.5 = 2.352349955 x = 2.352349955 Simplifying x = 2.352349955

Subproblem 2

x + 3.5 = -5.852349955 Simplifying x + 3.5 = -5.852349955 Reorder the terms: 3.5 + x = -5.852349955 Solving 3.5 + x = -5.852349955 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 = -5.852349955 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -5.852349955 + -3.5 x = -5.852349955 + -3.5 Combine like terms: -5.852349955 + -3.5 = -9.352349955 x = -9.352349955 Simplifying x = -9.352349955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.352349955, -9.352349955}

See similar equations:

| M^2+7M=4 | | 2(x+3y-1)=y | | 5(x-y)+2y=-26 | | 7x-(3x-4)=8-6x-6+5x | | log(7)=2 | | 14.40+4.05p=4.50(3+p) | | y=13x+404+46 | | 3(3x-6)=1-2x | | x+(x-10)+2(x-10)+6=100 | | 3x^2-5xy+2y^2+3x=0 | | 2.8-5.6= | | 5y-30y+10=-52+2y-4y | | (x^2+x)-6= | | 5*24-3x=90 | | 3k-s=7k-21 | | 5(y+2)=4-7 | | =y-6y^3 | | -(x-1)-3(x+4)=x | | -(x-1)+3(x+4)=x | | 16x+12x=100 | | xy+2x-3y+2+12(x^2)y-3x(y^2)-12x+18y=16 | | 2(x-1)=-(x-3)+(4-x) | | -5.99+23.105x=-587.72x-54.936 | | 36-yi=4x+3i | | (x+2)=-(x-3) | | 5y=11x+6 | | f(x)=2x+3x-1 | | x^2-4x=x(7+x) | | -(x+2)=-(x-3) | | 12m^2-17m-5= | | 15-4x+16=11 | | -6x+15=18x-7 |

Equations solver categories