4y^2-5y+16-14y^2-5y+7=

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Solution for 4y^2-5y+16-14y^2-5y+7= equation:


Simplifying
4y2 + -5y + 16 + -14y2 + -5y + 7 = 0

Reorder the terms:
16 + 7 + -5y + -5y + 4y2 + -14y2 = 0

Combine like terms: 16 + 7 = 23
23 + -5y + -5y + 4y2 + -14y2 = 0

Combine like terms: -5y + -5y = -10y
23 + -10y + 4y2 + -14y2 = 0

Combine like terms: 4y2 + -14y2 = -10y2
23 + -10y + -10y2 = 0

Solving
23 + -10y + -10y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-2.3 + y + y2 = 0.0

Move the constant term to the right:

Add '2.3' to each side of the equation.
-2.3 + y + 2.3 + y2 = 0.0 + 2.3

Reorder the terms:
-2.3 + 2.3 + y + y2 = 0.0 + 2.3

Combine like terms: -2.3 + 2.3 = 0.0
0.0 + y + y2 = 0.0 + 2.3
y + y2 = 0.0 + 2.3

Combine like terms: 0.0 + 2.3 = 2.3
y + y2 = 2.3

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + y2 = 2.3 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + y2 = 2.3 + 0.25

Combine like terms: 2.3 + 0.25 = 2.55
1.25 + y2 = 2.55

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = 2.55

Calculate the square root of the right side: 1.596871942

Break this problem into two subproblems by setting 
(y + 0.5) equal to 1.596871942 and -1.596871942.

Subproblem 1

y + 0.5 = 1.596871942 Simplifying y + 0.5 = 1.596871942 Reorder the terms: 0.5 + y = 1.596871942 Solving 0.5 + y = 1.596871942 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 1.596871942 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 1.596871942 + -0.5 y = 1.596871942 + -0.5 Combine like terms: 1.596871942 + -0.5 = 1.096871942 y = 1.096871942 Simplifying y = 1.096871942

Subproblem 2

y + 0.5 = -1.596871942 Simplifying y + 0.5 = -1.596871942 Reorder the terms: 0.5 + y = -1.596871942 Solving 0.5 + y = -1.596871942 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -1.596871942 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -1.596871942 + -0.5 y = -1.596871942 + -0.5 Combine like terms: -1.596871942 + -0.5 = -2.096871942 y = -2.096871942 Simplifying y = -2.096871942

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.096871942, -2.096871942}

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