5a^2=17a-15

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Solution for 5a^2=17a-15 equation:


Simplifying
5a2 = 17a + -15

Reorder the terms:
5a2 = -15 + 17a

Solving
5a2 = -15 + 17a

Solving for variable 'a'.

Reorder the terms:
15 + -17a + 5a2 = -15 + 17a + 15 + -17a

Reorder the terms:
15 + -17a + 5a2 = -15 + 15 + 17a + -17a

Combine like terms: -15 + 15 = 0
15 + -17a + 5a2 = 0 + 17a + -17a
15 + -17a + 5a2 = 17a + -17a

Combine like terms: 17a + -17a = 0
15 + -17a + 5a2 = 0

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

Divide each side by '5'.
3 + -3.4a + a2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -3.4a + -3 + a2 = 0 + -3

Reorder the terms:
3 + -3 + -3.4a + a2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -3.4a + a2 = 0 + -3
-3.4a + a2 = 0 + -3

Combine like terms: 0 + -3 = -3
-3.4a + a2 = -3

The a term is -3.4a.  Take half its coefficient (-1.7).
Square it (2.89) and add it to both sides.

Add '2.89' to each side of the equation.
-3.4a + 2.89 + a2 = -3 + 2.89

Reorder the terms:
2.89 + -3.4a + a2 = -3 + 2.89

Combine like terms: -3 + 2.89 = -0.11
2.89 + -3.4a + a2 = -0.11

Factor a perfect square on the left side:
(a + -1.7)(a + -1.7) = -0.11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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