2x^2=-21x-49

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Solution for 2x^2=-21x-49 equation:


Simplifying
2x2 = -21x + -49

Reorder the terms:
2x2 = -49 + -21x

Solving
2x2 = -49 + -21x

Solving for variable 'x'.

Reorder the terms:
49 + 21x + 2x2 = -49 + -21x + 49 + 21x

Reorder the terms:
49 + 21x + 2x2 = -49 + 49 + -21x + 21x

Combine like terms: -49 + 49 = 0
49 + 21x + 2x2 = 0 + -21x + 21x
49 + 21x + 2x2 = -21x + 21x

Combine like terms: -21x + 21x = 0
49 + 21x + 2x2 = 0

Factor a trinomial.
(7 + x)(7 + 2x) = 0

Subproblem 1

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(7 + 2x)' equal to zero and attempt to solve: Simplifying 7 + 2x = 0 Solving 7 + 2x = 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 + 2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 0 + -7 2x = 0 + -7 Combine like terms: 0 + -7 = -7 2x = -7 Divide each side by '2'. x = -3.5 Simplifying x = -3.5

Solution

x = {-7, -3.5}

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