4w^2=21w-20

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Solution for 4w^2=21w-20 equation:


Simplifying
4w2 = 21w + -20

Reorder the terms:
4w2 = -20 + 21w

Solving
4w2 = -20 + 21w

Solving for variable 'w'.

Reorder the terms:
20 + -21w + 4w2 = -20 + 21w + 20 + -21w

Reorder the terms:
20 + -21w + 4w2 = -20 + 20 + 21w + -21w

Combine like terms: -20 + 20 = 0
20 + -21w + 4w2 = 0 + 21w + -21w
20 + -21w + 4w2 = 21w + -21w

Combine like terms: 21w + -21w = 0
20 + -21w + 4w2 = 0

Factor a trinomial.
(5 + -4w)(4 + -1w) = 0

Subproblem 1

Set the factor '(5 + -4w)' equal to zero and attempt to solve: Simplifying 5 + -4w = 0 Solving 5 + -4w = 0 Move all terms containing w to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4w = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4w = 0 + -5 -4w = 0 + -5 Combine like terms: 0 + -5 = -5 -4w = -5 Divide each side by '-4'. w = 1.25 Simplifying w = 1.25

Subproblem 2

Set the factor '(4 + -1w)' equal to zero and attempt to solve: Simplifying 4 + -1w = 0 Solving 4 + -1w = 0 Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1w = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1w = 0 + -4 -1w = 0 + -4 Combine like terms: 0 + -4 = -4 -1w = -4 Divide each side by '-1'. w = 4 Simplifying w = 4

Solution

w = {1.25, 4}

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