4x^2+x-35=

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Solution for 4x^2+x-35= equation:


Simplifying
4x2 + x + -35 = 0

Reorder the terms:
-35 + x + 4x2 = 0

Solving
-35 + x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-8.75 + 0.25x + x2 = 0

Move the constant term to the right:

Add '8.75' to each side of the equation.
-8.75 + 0.25x + 8.75 + x2 = 0 + 8.75

Reorder the terms:
-8.75 + 8.75 + 0.25x + x2 = 0 + 8.75

Combine like terms: -8.75 + 8.75 = 0.00
0.00 + 0.25x + x2 = 0 + 8.75
0.25x + x2 = 0 + 8.75

Combine like terms: 0 + 8.75 = 8.75
0.25x + x2 = 8.75

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.25x + 0.25 + x2 = 8.75 + 0.25

Reorder the terms:
0.25 + 0.25x + x2 = 8.75 + 0.25

Combine like terms: 8.75 + 0.25 = 9
0.25 + 0.25x + x2 = 9

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 9

Calculate the square root of the right side: 3

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3 and -3.

Subproblem 1

x + 0.5 = 3 Simplifying x + 0.5 = 3 Reorder the terms: 0.5 + x = 3 Solving 0.5 + x = 3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3 + -0.5 x = 3 + -0.5 Combine like terms: 3 + -0.5 = 2.5 x = 2.5 Simplifying x = 2.5

Subproblem 2

x + 0.5 = -3 Simplifying x + 0.5 = -3 Reorder the terms: 0.5 + x = -3 Solving 0.5 + x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3 + -0.5 x = -3 + -0.5 Combine like terms: -3 + -0.5 = -3.5 x = -3.5 Simplifying x = -3.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.5, -3.5}

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