(50+x)(30+x)-150=425

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Solution for (50+x)(30+x)-150=425 equation:


Simplifying
(50 + x)(30 + x) + -150 = 425

Multiply (50 + x) * (30 + x)
(50(30 + x) + x(30 + x)) + -150 = 425
((30 * 50 + x * 50) + x(30 + x)) + -150 = 425
((1500 + 50x) + x(30 + x)) + -150 = 425
(1500 + 50x + (30 * x + x * x)) + -150 = 425
(1500 + 50x + (30x + x2)) + -150 = 425

Combine like terms: 50x + 30x = 80x
(1500 + 80x + x2) + -150 = 425

Reorder the terms:
1500 + -150 + 80x + x2 = 425

Combine like terms: 1500 + -150 = 1350
1350 + 80x + x2 = 425

Solving
1350 + 80x + x2 = 425

Solving for variable 'x'.

Reorder the terms:
1350 + -425 + 80x + x2 = 425 + -425

Combine like terms: 1350 + -425 = 925
925 + 80x + x2 = 425 + -425

Combine like terms: 425 + -425 = 0
925 + 80x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-925' to each side of the equation.
925 + 80x + -925 + x2 = 0 + -925

Reorder the terms:
925 + -925 + 80x + x2 = 0 + -925

Combine like terms: 925 + -925 = 0
0 + 80x + x2 = 0 + -925
80x + x2 = 0 + -925

Combine like terms: 0 + -925 = -925
80x + x2 = -925

The x term is 80x.  Take half its coefficient (40).
Square it (1600) and add it to both sides.

Add '1600' to each side of the equation.
80x + 1600 + x2 = -925 + 1600

Reorder the terms:
1600 + 80x + x2 = -925 + 1600

Combine like terms: -925 + 1600 = 675
1600 + 80x + x2 = 675

Factor a perfect square on the left side:
(x + 40)(x + 40) = 675

Calculate the square root of the right side: 25.980762114

Break this problem into two subproblems by setting 
(x + 40) equal to 25.980762114 and -25.980762114.

Subproblem 1

x + 40 = 25.980762114 Simplifying x + 40 = 25.980762114 Reorder the terms: 40 + x = 25.980762114 Solving 40 + x = 25.980762114 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + x = 25.980762114 + -40 Combine like terms: 40 + -40 = 0 0 + x = 25.980762114 + -40 x = 25.980762114 + -40 Combine like terms: 25.980762114 + -40 = -14.019237886 x = -14.019237886 Simplifying x = -14.019237886

Subproblem 2

x + 40 = -25.980762114 Simplifying x + 40 = -25.980762114 Reorder the terms: 40 + x = -25.980762114 Solving 40 + x = -25.980762114 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + x = -25.980762114 + -40 Combine like terms: 40 + -40 = 0 0 + x = -25.980762114 + -40 x = -25.980762114 + -40 Combine like terms: -25.980762114 + -40 = -65.980762114 x = -65.980762114 Simplifying x = -65.980762114

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-14.019237886, -65.980762114}

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