2d^2=8-10d

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Solution for 2d^2=8-10d equation:


Simplifying
2d2 = 8 + -10d

Solving
2d2 = 8 + -10d

Solving for variable 'd'.

Reorder the terms:
-8 + 10d + 2d2 = 8 + -10d + -8 + 10d

Reorder the terms:
-8 + 10d + 2d2 = 8 + -8 + -10d + 10d

Combine like terms: 8 + -8 = 0
-8 + 10d + 2d2 = 0 + -10d + 10d
-8 + 10d + 2d2 = -10d + 10d

Combine like terms: -10d + 10d = 0
-8 + 10d + 2d2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-4 + 5d + d2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-4 + 5d + d2)' equal to zero and attempt to solve: Simplifying -4 + 5d + d2 = 0 Solving -4 + 5d + d2 = 0 Begin completing the square. Move the constant term to the right: Add '4' to each side of the equation. -4 + 5d + 4 + d2 = 0 + 4 Reorder the terms: -4 + 4 + 5d + d2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 5d + d2 = 0 + 4 5d + d2 = 0 + 4 Combine like terms: 0 + 4 = 4 5d + d2 = 4 The d term is 5d. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5d + 6.25 + d2 = 4 + 6.25 Reorder the terms: 6.25 + 5d + d2 = 4 + 6.25 Combine like terms: 4 + 6.25 = 10.25 6.25 + 5d + d2 = 10.25 Factor a perfect square on the left side: (d + 2.5)(d + 2.5) = 10.25 Calculate the square root of the right side: 3.201562119 Break this problem into two subproblems by setting (d + 2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

d + 2.5 = 3.201562119 Simplifying d + 2.5 = 3.201562119 Reorder the terms: 2.5 + d = 3.201562119 Solving 2.5 + d = 3.201562119 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + d = 3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + d = 3.201562119 + -2.5 d = 3.201562119 + -2.5 Combine like terms: 3.201562119 + -2.5 = 0.701562119 d = 0.701562119 Simplifying d = 0.701562119

Subproblem 2

d + 2.5 = -3.201562119 Simplifying d + 2.5 = -3.201562119 Reorder the terms: 2.5 + d = -3.201562119 Solving 2.5 + d = -3.201562119 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + d = -3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + d = -3.201562119 + -2.5 d = -3.201562119 + -2.5 Combine like terms: -3.201562119 + -2.5 = -5.701562119 d = -5.701562119 Simplifying d = -5.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. d = {0.701562119, -5.701562119}

Solution

d = {0.701562119, -5.701562119}

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