y^2+45y-63=0

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Solution for y^2+45y-63=0 equation:


Simplifying
y2 + 45y + -63 = 0

Reorder the terms:
-63 + 45y + y2 = 0

Solving
-63 + 45y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + 45y + 63 + y2 = 0 + 63

Reorder the terms:
-63 + 63 + 45y + y2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 45y + y2 = 0 + 63
45y + y2 = 0 + 63

Combine like terms: 0 + 63 = 63
45y + y2 = 63

The y term is 45y.  Take half its coefficient (22.5).
Square it (506.25) and add it to both sides.

Add '506.25' to each side of the equation.
45y + 506.25 + y2 = 63 + 506.25

Reorder the terms:
506.25 + 45y + y2 = 63 + 506.25

Combine like terms: 63 + 506.25 = 569.25
506.25 + 45y + y2 = 569.25

Factor a perfect square on the left side:
(y + 22.5)(y + 22.5) = 569.25

Calculate the square root of the right side: 23.858960581

Break this problem into two subproblems by setting 
(y + 22.5) equal to 23.858960581 and -23.858960581.

Subproblem 1

y + 22.5 = 23.858960581 Simplifying y + 22.5 = 23.858960581 Reorder the terms: 22.5 + y = 23.858960581 Solving 22.5 + y = 23.858960581 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-22.5' to each side of the equation. 22.5 + -22.5 + y = 23.858960581 + -22.5 Combine like terms: 22.5 + -22.5 = 0.0 0.0 + y = 23.858960581 + -22.5 y = 23.858960581 + -22.5 Combine like terms: 23.858960581 + -22.5 = 1.358960581 y = 1.358960581 Simplifying y = 1.358960581

Subproblem 2

y + 22.5 = -23.858960581 Simplifying y + 22.5 = -23.858960581 Reorder the terms: 22.5 + y = -23.858960581 Solving 22.5 + y = -23.858960581 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-22.5' to each side of the equation. 22.5 + -22.5 + y = -23.858960581 + -22.5 Combine like terms: 22.5 + -22.5 = 0.0 0.0 + y = -23.858960581 + -22.5 y = -23.858960581 + -22.5 Combine like terms: -23.858960581 + -22.5 = -46.358960581 y = -46.358960581 Simplifying y = -46.358960581

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.358960581, -46.358960581}

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