25y^2-20y+7=0

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Solution for 25y^2-20y+7=0 equation:


Simplifying
25y2 + -20y + 7 = 0

Reorder the terms:
7 + -20y + 25y2 = 0

Solving
7 + -20y + 25y2 = 0

Solving for variable 'y'.

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

Divide each side by '25'.
0.28 + -0.8y + y2 = 0

Move the constant term to the right:

Add '-0.28' to each side of the equation.
0.28 + -0.8y + -0.28 + y2 = 0 + -0.28

Reorder the terms:
0.28 + -0.28 + -0.8y + y2 = 0 + -0.28

Combine like terms: 0.28 + -0.28 = 0.00
0.00 + -0.8y + y2 = 0 + -0.28
-0.8y + y2 = 0 + -0.28

Combine like terms: 0 + -0.28 = -0.28
-0.8y + y2 = -0.28

The y term is -0.8y.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8y + 0.16 + y2 = -0.28 + 0.16

Reorder the terms:
0.16 + -0.8y + y2 = -0.28 + 0.16

Combine like terms: -0.28 + 0.16 = -0.12
0.16 + -0.8y + y2 = -0.12

Factor a perfect square on the left side:
(y + -0.4)(y + -0.4) = -0.12

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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