4s^2=25s+21

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


Simplifying
4s2 = 25s + 21

Reorder the terms:
4s2 = 21 + 25s

Solving
4s2 = 21 + 25s

Solving for variable 's'.

Reorder the terms:
-21 + -25s + 4s2 = 21 + 25s + -21 + -25s

Reorder the terms:
-21 + -25s + 4s2 = 21 + -21 + 25s + -25s

Combine like terms: 21 + -21 = 0
-21 + -25s + 4s2 = 0 + 25s + -25s
-21 + -25s + 4s2 = 25s + -25s

Combine like terms: 25s + -25s = 0
-21 + -25s + 4s2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

s = {-0.75, 7}

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