1960=245x-4.9x^2

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Solution for 1960=245x-4.9x^2 equation:


Simplifying
1960 = 245x + -4.9x2

Solving
1960 = 245x + -4.9x2

Solving for variable 'x'.

Reorder the terms:
1960 + -245x + 4.9x2 = 245x + -245x + -4.9x2 + 4.9x2

Combine like terms: 245x + -245x = 0
1960 + -245x + 4.9x2 = 0 + -4.9x2 + 4.9x2
1960 + -245x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
1960 + -245x + 4.9x2 = 0.0

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

Divide each side by '4.9'.
400 + -50x + x2 = 0

Move the constant term to the right:

Add '-400' to each side of the equation.
400 + -50x + -400 + x2 = 0 + -400

Reorder the terms:
400 + -400 + -50x + x2 = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -50x + x2 = 0 + -400
-50x + x2 = 0 + -400

Combine like terms: 0 + -400 = -400
-50x + x2 = -400

The x term is -50x.  Take half its coefficient (-25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
-50x + 625 + x2 = -400 + 625

Reorder the terms:
625 + -50x + x2 = -400 + 625

Combine like terms: -400 + 625 = 225
625 + -50x + x2 = 225

Factor a perfect square on the left side:
(x + -25)(x + -25) = 225

Calculate the square root of the right side: 15

Break this problem into two subproblems by setting 
(x + -25) equal to 15 and -15.

Subproblem 1

x + -25 = 15 Simplifying x + -25 = 15 Reorder the terms: -25 + x = 15 Solving -25 + x = 15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = 15 + 25 Combine like terms: -25 + 25 = 0 0 + x = 15 + 25 x = 15 + 25 Combine like terms: 15 + 25 = 40 x = 40 Simplifying x = 40

Subproblem 2

x + -25 = -15 Simplifying x + -25 = -15 Reorder the terms: -25 + x = -15 Solving -25 + x = -15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = -15 + 25 Combine like terms: -25 + 25 = 0 0 + x = -15 + 25 x = -15 + 25 Combine like terms: -15 + 25 = 10 x = 10 Simplifying x = 10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {40, 10}

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