4x^2=21x+49

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Solution for 4x^2=21x+49 equation:


Simplifying
4x2 = 21x + 49

Reorder the terms:
4x2 = 49 + 21x

Solving
4x2 = 49 + 21x

Solving for variable 'x'.

Reorder the terms:
-49 + -21x + 4x2 = 49 + 21x + -49 + -21x

Reorder the terms:
-49 + -21x + 4x2 = 49 + -49 + 21x + -21x

Combine like terms: 49 + -49 = 0
-49 + -21x + 4x2 = 0 + 21x + -21x
-49 + -21x + 4x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
-49 + -21x + 4x2 = 0

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

Subproblem 1

Set the factor '(-7 + -4x)' equal to zero and attempt to solve: Simplifying -7 + -4x = 0 Solving -7 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4x = 0 + 7 -4x = 0 + 7 Combine like terms: 0 + 7 = 7 -4x = 7 Divide each side by '-4'. x = -1.75 Simplifying x = -1.75

Subproblem 2

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

Solution

x = {-1.75, 7}

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