x^2+18x-704=0

Simple and best practice solution for x^2+18x-704=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+18x-704=0 equation:


Simplifying
x2 + 18x + -704 = 0

Reorder the terms:
-704 + 18x + x2 = 0

Solving
-704 + 18x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '704' to each side of the equation.
-704 + 18x + 704 + x2 = 0 + 704

Reorder the terms:
-704 + 704 + 18x + x2 = 0 + 704

Combine like terms: -704 + 704 = 0
0 + 18x + x2 = 0 + 704
18x + x2 = 0 + 704

Combine like terms: 0 + 704 = 704
18x + x2 = 704

The x term is 18x.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18x + 81 + x2 = 704 + 81

Reorder the terms:
81 + 18x + x2 = 704 + 81

Combine like terms: 704 + 81 = 785
81 + 18x + x2 = 785

Factor a perfect square on the left side:
(x + 9)(x + 9) = 785

Calculate the square root of the right side: 28.017851452

Break this problem into two subproblems by setting 
(x + 9) equal to 28.017851452 and -28.017851452.

Subproblem 1

x + 9 = 28.017851452 Simplifying x + 9 = 28.017851452 Reorder the terms: 9 + x = 28.017851452 Solving 9 + x = 28.017851452 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 28.017851452 + -9 Combine like terms: 9 + -9 = 0 0 + x = 28.017851452 + -9 x = 28.017851452 + -9 Combine like terms: 28.017851452 + -9 = 19.017851452 x = 19.017851452 Simplifying x = 19.017851452

Subproblem 2

x + 9 = -28.017851452 Simplifying x + 9 = -28.017851452 Reorder the terms: 9 + x = -28.017851452 Solving 9 + x = -28.017851452 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -28.017851452 + -9 Combine like terms: 9 + -9 = 0 0 + x = -28.017851452 + -9 x = -28.017851452 + -9 Combine like terms: -28.017851452 + -9 = -37.017851452 x = -37.017851452 Simplifying x = -37.017851452

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.017851452, -37.017851452}

See similar equations:

| 5x-2x+7=19 | | 242=-9(4x-31)-37(1+29x) | | X(189050)=995000 | | X+.0825X=40 | | 4x-4/x-1 | | 3(2x-4)-2x=2(4x+5) | | X/3-8=10 | | -18=-6(X+2) | | y=5+-8x+2x^2 | | Y=abx+c | | x-3/6=7 | | .64=20/x | | 2/3x-14=-10 | | 5(x+4)2+2=322 | | 8(4x-2)-96=6(40-3x)+48 | | -1/2-1/5u=2/3 | | 50=t^2-20t | | 21/33 | | x*10=5 | | 14x-2(7-3x)=6 | | 5xy-3xz= | | -2(x-1)+8=10-4(x+3) | | 5(5u+3)-5(2u+1)=27 | | ydx+(2sqrt(xy)-x)*dy=0 | | x+(x*.15)=8.34 | | x+(x*.15)=8.03 | | -47x+84=-268 | | 4(x-3)=3(x-9) | | -4j-*-5)/-7=13 | | 9(2x+6)-(x+3)=4x-18 | | -3x^2=-5x+3 | | -2/9u=16 |

Equations solver categories