4x^2+5x+1=85

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Solution for 4x^2+5x+1=85 equation:


Simplifying
4x2 + 5x + 1 = 85

Reorder the terms:
1 + 5x + 4x2 = 85

Solving
1 + 5x + 4x2 = 85

Solving for variable 'x'.

Reorder the terms:
1 + -85 + 5x + 4x2 = 85 + -85

Combine like terms: 1 + -85 = -84
-84 + 5x + 4x2 = 85 + -85

Combine like terms: 85 + -85 = 0
-84 + 5x + 4x2 = 0

Factor a trinomial.
(-21 + -4x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-21 + -4x)' equal to zero and attempt to solve: Simplifying -21 + -4x = 0 Solving -21 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -4x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -4x = 0 + 21 -4x = 0 + 21 Combine like terms: 0 + 21 = 21 -4x = 21 Divide each side by '-4'. x = -5.25 Simplifying x = -5.25

Subproblem 2

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

Solution

x = {-5.25, 4}

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