(4u^2+1)-(2u^2-3u+5)=

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Solution for (4u^2+1)-(2u^2-3u+5)= equation:


Simplifying
(4u2 + 1) + -1(2u2 + -3u + 5) = 0

Reorder the terms:
(1 + 4u2) + -1(2u2 + -3u + 5) = 0

Remove parenthesis around (1 + 4u2)
1 + 4u2 + -1(2u2 + -3u + 5) = 0

Reorder the terms:
1 + 4u2 + -1(5 + -3u + 2u2) = 0
1 + 4u2 + (5 * -1 + -3u * -1 + 2u2 * -1) = 0
1 + 4u2 + (-5 + 3u + -2u2) = 0

Reorder the terms:
1 + -5 + 3u + 4u2 + -2u2 = 0

Combine like terms: 1 + -5 = -4
-4 + 3u + 4u2 + -2u2 = 0

Combine like terms: 4u2 + -2u2 = 2u2
-4 + 3u + 2u2 = 0

Solving
-4 + 3u + 2u2 = 0

Solving for variable 'u'.

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

Divide each side by '2'.
-2 + 1.5u + u2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 1.5u + 2 + u2 = 0 + 2

Reorder the terms:
-2 + 2 + 1.5u + u2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 1.5u + u2 = 0 + 2
1.5u + u2 = 0 + 2

Combine like terms: 0 + 2 = 2
1.5u + u2 = 2

The u term is 1.5u.  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.
1.5u + 0.5625 + u2 = 2 + 0.5625

Reorder the terms:
0.5625 + 1.5u + u2 = 2 + 0.5625

Combine like terms: 2 + 0.5625 = 2.5625
0.5625 + 1.5u + u2 = 2.5625

Factor a perfect square on the left side:
(u + 0.75)(u + 0.75) = 2.5625

Calculate the square root of the right side: 1.600781059

Break this problem into two subproblems by setting 
(u + 0.75) equal to 1.600781059 and -1.600781059.

Subproblem 1

u + 0.75 = 1.600781059 Simplifying u + 0.75 = 1.600781059 Reorder the terms: 0.75 + u = 1.600781059 Solving 0.75 + u = 1.600781059 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + u = 1.600781059 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + u = 1.600781059 + -0.75 u = 1.600781059 + -0.75 Combine like terms: 1.600781059 + -0.75 = 0.850781059 u = 0.850781059 Simplifying u = 0.850781059

Subproblem 2

u + 0.75 = -1.600781059 Simplifying u + 0.75 = -1.600781059 Reorder the terms: 0.75 + u = -1.600781059 Solving 0.75 + u = -1.600781059 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + u = -1.600781059 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + u = -1.600781059 + -0.75 u = -1.600781059 + -0.75 Combine like terms: -1.600781059 + -0.75 = -2.350781059 u = -2.350781059 Simplifying u = -2.350781059

Solution

The solution to the problem is based on the solutions from the subproblems. u = {0.850781059, -2.350781059}

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