x^2-10x-8=-9

Simple and best practice solution for x^2-10x-8=-9 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^2-10x-8=-9 equation:


Simplifying
x2 + -10x + -8 = -9

Reorder the terms:
-8 + -10x + x2 = -9

Solving
-8 + -10x + x2 = -9

Solving for variable 'x'.

Reorder the terms:
-8 + 9 + -10x + x2 = -9 + 9

Combine like terms: -8 + 9 = 1
1 + -10x + x2 = -9 + 9

Combine like terms: -9 + 9 = 0
1 + -10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -10x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -10x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -10x + x2 = 0 + -1
-10x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-10x + x2 = -1

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -1 + 25

Reorder the terms:
25 + -10x + x2 = -1 + 25

Combine like terms: -1 + 25 = 24
25 + -10x + x2 = 24

Factor a perfect square on the left side:
(x + -5)(x + -5) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + -5) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + -5 = 4.898979486 Simplifying x + -5 = 4.898979486 Reorder the terms: -5 + x = 4.898979486 Solving -5 + x = 4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 4.898979486 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.898979486 + 5 x = 4.898979486 + 5 Combine like terms: 4.898979486 + 5 = 9.898979486 x = 9.898979486 Simplifying x = 9.898979486

Subproblem 2

x + -5 = -4.898979486 Simplifying x + -5 = -4.898979486 Reorder the terms: -5 + x = -4.898979486 Solving -5 + x = -4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -4.898979486 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.898979486 + 5 x = -4.898979486 + 5 Combine like terms: -4.898979486 + 5 = 0.101020514 x = 0.101020514 Simplifying x = 0.101020514

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.898979486, 0.101020514}

See similar equations:

| -3(4+2r)=-28 | | -7c-6=-27 | | Y=-10x-4+9+3x | | 57-(4x+9)=4(x+3)+x | | 10(x-6)=-91 | | x^2+30x+104=0 | | 4(6-9r)=28 | | -5-2(1+6d)=-28 | | 25+8x=33-[12-(7-5)+10-9x] | | 3y-2+y+16=8+8y+12-6y | | 3x-1.5=1 | | 87n-65=-43n | | -18=-3+8(z-5) | | x^2-14x+65=16 | | y=-7r-2r | | 3x^2+6+x-3=81 | | 87n-65=-63n | | -17+6a=-7(2a+5) | | Y=-3a-6a | | 3(2x-1)=4*x-11 | | -5(1+4a)=15 | | y=6k-2k | | 7x-12=12-3 | | 5(x-1)+4x=13+9(x-2) | | -20=6f+4f | | 7x/3=x^2/6 | | 4z+2+8z=-35 | | 31=-7(6s+5) | | 4-3/8^2 | | C=60+0.9(600) | | -m/-12=6 | | 6k-4-9=-29 |

Equations solver categories