-x^2+56x+343=0

Simple and best practice solution for -x^2+56x+343=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+56x+343=0 equation:


Simplifying
-1x2 + 56x + 343 = 0

Reorder the terms:
343 + 56x + -1x2 = 0

Solving
343 + 56x + -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'.
-343 + -56x + x2 = 0

Move the constant term to the right:

Add '343' to each side of the equation.
-343 + -56x + 343 + x2 = 0 + 343

Reorder the terms:
-343 + 343 + -56x + x2 = 0 + 343

Combine like terms: -343 + 343 = 0
0 + -56x + x2 = 0 + 343
-56x + x2 = 0 + 343

Combine like terms: 0 + 343 = 343
-56x + x2 = 343

The x term is -56x.  Take half its coefficient (-28).
Square it (784) and add it to both sides.

Add '784' to each side of the equation.
-56x + 784 + x2 = 343 + 784

Reorder the terms:
784 + -56x + x2 = 343 + 784

Combine like terms: 343 + 784 = 1127
784 + -56x + x2 = 1127

Factor a perfect square on the left side:
(x + -28)(x + -28) = 1127

Calculate the square root of the right side: 33.570820663

Break this problem into two subproblems by setting 
(x + -28) equal to 33.570820663 and -33.570820663.

Subproblem 1

x + -28 = 33.570820663 Simplifying x + -28 = 33.570820663 Reorder the terms: -28 + x = 33.570820663 Solving -28 + x = 33.570820663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = 33.570820663 + 28 Combine like terms: -28 + 28 = 0 0 + x = 33.570820663 + 28 x = 33.570820663 + 28 Combine like terms: 33.570820663 + 28 = 61.570820663 x = 61.570820663 Simplifying x = 61.570820663

Subproblem 2

x + -28 = -33.570820663 Simplifying x + -28 = -33.570820663 Reorder the terms: -28 + x = -33.570820663 Solving -28 + x = -33.570820663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = -33.570820663 + 28 Combine like terms: -28 + 28 = 0 0 + x = -33.570820663 + 28 x = -33.570820663 + 28 Combine like terms: -33.570820663 + 28 = -5.570820663 x = -5.570820663 Simplifying x = -5.570820663

Solution

The solution to the problem is based on the solutions from the subproblems. x = {61.570820663, -5.570820663}

See similar equations:

| 6m+2+7t+14= | | 14x^2+20x=0 | | -7x^4-26x^2-x+9=0 | | -x+2y+2z=7 | | 5(2a+6)-4= | | 4^3/2(8d)^3 | | 720=300x | | 5(2a+6)-4a=b | | 3cos(3x)=0 | | 12x^3+10=0 | | 10+3x=5y | | 14n^3/3x^4y^4/7mn^2/9x^3y | | 2(3x-4)+(2x+2)=142 | | 2x-10=3x-40 | | (x+1)(x-3)(x+3i)(x-3i)=0 | | (3x^2-2x-7)+(9x^2-7x+6)-(2x^2-2x+4)= | | ln(x+14)-(ln)(8-3x)=3ln(2) | | 3+2(3m-1)= | | 4x^2+20x-200=0 | | N=Ncy | | y=lx+1l-4 | | 3x+2x=63 | | y=-.008x+46.962 | | 0=2x-5x-18 | | ln(x+14)-ln(8-3x)=3*ln(2) | | x^2-2x+4y^2=3 | | 2y-5-7.5y+6= | | X+2y=6x-y | | x-12=59 | | 5(3x+6)-2(3x+6)=0 | | 40=(w+3)w | | N=Icy |

Equations solver categories