-0.5d(d-1.5)=2.5

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Solution for -0.5d(d-1.5)=2.5 equation:


Simplifying
-0.5d(d + -1.5) = 2.5

Reorder the terms:
-0.5d(-1.5 + d) = 2.5
(-1.5 * -0.5d + d * -0.5d) = 2.5
(0.75d + -0.5d2) = 2.5

Solving
0.75d + -0.5d2 = 2.5

Solving for variable 'd'.

Reorder the terms:
-2.5 + 0.75d + -0.5d2 = 2.5 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
-2.5 + 0.75d + -0.5d2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
5 + -1.5d + d2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -1.5d + -5 + d2 = 0 + -5

Reorder the terms:
5 + -5 + -1.5d + d2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1.5d + d2 = 0 + -5
-1.5d + d2 = 0 + -5

Combine like terms: 0 + -5 = -5
-1.5d + d2 = -5

The d term is -1.5d.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5d + 0.5625 + d2 = -5 + 0.5625

Reorder the terms:
0.5625 + -1.5d + d2 = -5 + 0.5625

Combine like terms: -5 + 0.5625 = -4.4375
0.5625 + -1.5d + d2 = -4.4375

Factor a perfect square on the left side:
(d + -0.75)(d + -0.75) = -4.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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