y^2+1.4y+0.49-36y^2=0

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Solution for y^2+1.4y+0.49-36y^2=0 equation:


Simplifying
y2 + 1.4y + 0.49 + -36y2 = 0

Reorder the terms:
0.49 + 1.4y + y2 + -36y2 = 0

Combine like terms: y2 + -36y2 = -35y2
0.49 + 1.4y + -35y2 = 0

Solving
0.49 + 1.4y + -35y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-35 the coefficient of the squared term: 

Divide each side by '-35'.
-0.014 + -0.04y + y2 = 0

Move the constant term to the right:

Add '0.014' to each side of the equation.
-0.014 + -0.04y + 0.014 + y2 = 0 + 0.014

Reorder the terms:
-0.014 + 0.014 + -0.04y + y2 = 0 + 0.014

Combine like terms: -0.014 + 0.014 = 0.000
0.000 + -0.04y + y2 = 0 + 0.014
-0.04y + y2 = 0 + 0.014

Combine like terms: 0 + 0.014 = 0.014
-0.04y + y2 = 0.014

The y term is -0.04y.  Take half its coefficient (-0.02).
Square it (0.0004) and add it to both sides.

Add '0.0004' to each side of the equation.
-0.04y + 0.0004 + y2 = 0.014 + 0.0004

Reorder the terms:
0.0004 + -0.04y + y2 = 0.014 + 0.0004

Combine like terms: 0.014 + 0.0004 = 0.0144
0.0004 + -0.04y + y2 = 0.0144

Factor a perfect square on the left side:
(y + -0.02)(y + -0.02) = 0.0144

Calculate the square root of the right side: 0.12

Break this problem into two subproblems by setting 
(y + -0.02) equal to 0.12 and -0.12.

Subproblem 1

y + -0.02 = 0.12 Simplifying y + -0.02 = 0.12 Reorder the terms: -0.02 + y = 0.12 Solving -0.02 + y = 0.12 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.02' to each side of the equation. -0.02 + 0.02 + y = 0.12 + 0.02 Combine like terms: -0.02 + 0.02 = 0.00 0.00 + y = 0.12 + 0.02 y = 0.12 + 0.02 Combine like terms: 0.12 + 0.02 = 0.14 y = 0.14 Simplifying y = 0.14

Subproblem 2

y + -0.02 = -0.12 Simplifying y + -0.02 = -0.12 Reorder the terms: -0.02 + y = -0.12 Solving -0.02 + y = -0.12 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.02' to each side of the equation. -0.02 + 0.02 + y = -0.12 + 0.02 Combine like terms: -0.02 + 0.02 = 0.00 0.00 + y = -0.12 + 0.02 y = -0.12 + 0.02 Combine like terms: -0.12 + 0.02 = -0.1 y = -0.1 Simplifying y = -0.1

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.14, -0.1}

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