x^2-7x-10=3

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Solution for x^2-7x-10=3 equation:


Simplifying
x2 + -7x + -10 = 3

Reorder the terms:
-10 + -7x + x2 = 3

Solving
-10 + -7x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
-10 + -3 + -7x + x2 = 3 + -3

Combine like terms: -10 + -3 = -13
-13 + -7x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-13 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -7x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + -7x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -7x + x2 = 0 + 13
-7x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
-7x + x2 = 13

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 13 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 13 + 12.25

Combine like terms: 13 + 12.25 = 25.25
12.25 + -7x + x2 = 25.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 25.25

Calculate the square root of the right side: 5.024937811

Break this problem into two subproblems by setting 
(x + -3.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

x + -3.5 = 5.024937811 Simplifying x + -3.5 = 5.024937811 Reorder the terms: -3.5 + x = 5.024937811 Solving -3.5 + x = 5.024937811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 5.024937811 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 5.024937811 + 3.5 x = 5.024937811 + 3.5 Combine like terms: 5.024937811 + 3.5 = 8.524937811 x = 8.524937811 Simplifying x = 8.524937811

Subproblem 2

x + -3.5 = -5.024937811 Simplifying x + -3.5 = -5.024937811 Reorder the terms: -3.5 + x = -5.024937811 Solving -3.5 + x = -5.024937811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -5.024937811 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -5.024937811 + 3.5 x = -5.024937811 + 3.5 Combine like terms: -5.024937811 + 3.5 = -1.524937811 x = -1.524937811 Simplifying x = -1.524937811

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.524937811, -1.524937811}

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