3x^2+2x^2-7x-50=0

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Solution for 3x^2+2x^2-7x-50=0 equation:


Simplifying
3x2 + 2x2 + -7x + -50 = 0

Reorder the terms:
-50 + -7x + 3x2 + 2x2 = 0

Combine like terms: 3x2 + 2x2 = 5x2
-50 + -7x + 5x2 = 0

Solving
-50 + -7x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-10 + -1.4x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -1.4x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -1.4x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -1.4x + x2 = 0 + 10
-1.4x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-1.4x + x2 = 10

The x term is -1.4x.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4x + 0.49 + x2 = 10 + 0.49

Reorder the terms:
0.49 + -1.4x + x2 = 10 + 0.49

Combine like terms: 10 + 0.49 = 10.49
0.49 + -1.4x + x2 = 10.49

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = 10.49

Calculate the square root of the right side: 3.238826948

Break this problem into two subproblems by setting 
(x + -0.7) equal to 3.238826948 and -3.238826948.

Subproblem 1

x + -0.7 = 3.238826948 Simplifying x + -0.7 = 3.238826948 Reorder the terms: -0.7 + x = 3.238826948 Solving -0.7 + x = 3.238826948 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = 3.238826948 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = 3.238826948 + 0.7 x = 3.238826948 + 0.7 Combine like terms: 3.238826948 + 0.7 = 3.938826948 x = 3.938826948 Simplifying x = 3.938826948

Subproblem 2

x + -0.7 = -3.238826948 Simplifying x + -0.7 = -3.238826948 Reorder the terms: -0.7 + x = -3.238826948 Solving -0.7 + x = -3.238826948 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = -3.238826948 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = -3.238826948 + 0.7 x = -3.238826948 + 0.7 Combine like terms: -3.238826948 + 0.7 = -2.538826948 x = -2.538826948 Simplifying x = -2.538826948

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.938826948, -2.538826948}

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