5X^2+15X+75=4

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Solution for 5X^2+15X+75=4 equation:


Simplifying
5X2 + 15X + 75 = 4

Reorder the terms:
75 + 15X + 5X2 = 4

Solving
75 + 15X + 5X2 = 4

Solving for variable 'X'.

Reorder the terms:
75 + -4 + 15X + 5X2 = 4 + -4

Combine like terms: 75 + -4 = 71
71 + 15X + 5X2 = 4 + -4

Combine like terms: 4 + -4 = 0
71 + 15X + 5X2 = 0

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

Divide each side by '5'.
14.2 + 3X + X2 = 0

Move the constant term to the right:

Add '-14.2' to each side of the equation.
14.2 + 3X + -14.2 + X2 = 0 + -14.2

Reorder the terms:
14.2 + -14.2 + 3X + X2 = 0 + -14.2

Combine like terms: 14.2 + -14.2 = 0.0
0.0 + 3X + X2 = 0 + -14.2
3X + X2 = 0 + -14.2

Combine like terms: 0 + -14.2 = -14.2
3X + X2 = -14.2

The X term is 3X.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3X + 2.25 + X2 = -14.2 + 2.25

Reorder the terms:
2.25 + 3X + X2 = -14.2 + 2.25

Combine like terms: -14.2 + 2.25 = -11.95
2.25 + 3X + X2 = -11.95

Factor a perfect square on the left side:
(X + 1.5)(X + 1.5) = -11.95

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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