25=16x^2+35x+7

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Solution for 25=16x^2+35x+7 equation:


Simplifying
25 = 16x2 + 35x + 7

Reorder the terms:
25 = 7 + 35x + 16x2

Solving
25 = 7 + 35x + 16x2

Solving for variable 'x'.

Combine like terms: 25 + -7 = 18
18 + -35x + -16x2 = 7 + 35x + 16x2 + -7 + -35x + -16x2

Reorder the terms:
18 + -35x + -16x2 = 7 + -7 + 35x + -35x + 16x2 + -16x2

Combine like terms: 7 + -7 = 0
18 + -35x + -16x2 = 0 + 35x + -35x + 16x2 + -16x2
18 + -35x + -16x2 = 35x + -35x + 16x2 + -16x2

Combine like terms: 35x + -35x = 0
18 + -35x + -16x2 = 0 + 16x2 + -16x2
18 + -35x + -16x2 = 16x2 + -16x2

Combine like terms: 16x2 + -16x2 = 0
18 + -35x + -16x2 = 0

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-1.125 + 2.1875x + x2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + 2.1875x + 1.125 + x2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + 2.1875x + x2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + 2.1875x + x2 = 0 + 1.125
2.1875x + x2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
2.1875x + x2 = 1.125

The x term is 2.1875x.  Take half its coefficient (1.09375).
Square it (1.196289063) and add it to both sides.

Add '1.196289063' to each side of the equation.
2.1875x + 1.196289063 + x2 = 1.125 + 1.196289063

Reorder the terms:
1.196289063 + 2.1875x + x2 = 1.125 + 1.196289063

Combine like terms: 1.125 + 1.196289063 = 2.321289063
1.196289063 + 2.1875x + x2 = 2.321289063

Factor a perfect square on the left side:
(x + 1.09375)(x + 1.09375) = 2.321289063

Calculate the square root of the right side: 1.523577718

Break this problem into two subproblems by setting 
(x + 1.09375) equal to 1.523577718 and -1.523577718.

Subproblem 1

x + 1.09375 = 1.523577718 Simplifying x + 1.09375 = 1.523577718 Reorder the terms: 1.09375 + x = 1.523577718 Solving 1.09375 + x = 1.523577718 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.09375' to each side of the equation. 1.09375 + -1.09375 + x = 1.523577718 + -1.09375 Combine like terms: 1.09375 + -1.09375 = 0.00000 0.00000 + x = 1.523577718 + -1.09375 x = 1.523577718 + -1.09375 Combine like terms: 1.523577718 + -1.09375 = 0.429827718 x = 0.429827718 Simplifying x = 0.429827718

Subproblem 2

x + 1.09375 = -1.523577718 Simplifying x + 1.09375 = -1.523577718 Reorder the terms: 1.09375 + x = -1.523577718 Solving 1.09375 + x = -1.523577718 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.09375' to each side of the equation. 1.09375 + -1.09375 + x = -1.523577718 + -1.09375 Combine like terms: 1.09375 + -1.09375 = 0.00000 0.00000 + x = -1.523577718 + -1.09375 x = -1.523577718 + -1.09375 Combine like terms: -1.523577718 + -1.09375 = -2.617327718 x = -2.617327718 Simplifying x = -2.617327718

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.429827718, -2.617327718}

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