4c^2=25c+21

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Solution for 4c^2=25c+21 equation:


Simplifying
4c2 = 25c + 21

Reorder the terms:
4c2 = 21 + 25c

Solving
4c2 = 21 + 25c

Solving for variable 'c'.

Reorder the terms:
-21 + -25c + 4c2 = 21 + 25c + -21 + -25c

Reorder the terms:
-21 + -25c + 4c2 = 21 + -21 + 25c + -25c

Combine like terms: 21 + -21 = 0
-21 + -25c + 4c2 = 0 + 25c + -25c
-21 + -25c + 4c2 = 25c + -25c

Combine like terms: 25c + -25c = 0
-21 + -25c + 4c2 = 0

Factor a trinomial.
(-3 + -4c)(7 + -1c) = 0

Subproblem 1

Set the factor '(-3 + -4c)' equal to zero and attempt to solve: Simplifying -3 + -4c = 0 Solving -3 + -4c = 0 Move all terms containing c to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4c = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4c = 0 + 3 -4c = 0 + 3 Combine like terms: 0 + 3 = 3 -4c = 3 Divide each side by '-4'. c = -0.75 Simplifying c = -0.75

Subproblem 2

Set the factor '(7 + -1c)' equal to zero and attempt to solve: Simplifying 7 + -1c = 0 Solving 7 + -1c = 0 Move all terms containing c to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1c = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1c = 0 + -7 -1c = 0 + -7 Combine like terms: 0 + -7 = -7 -1c = -7 Divide each side by '-1'. c = 7 Simplifying c = 7

Solution

c = {-0.75, 7}

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