2x^2-11x+21=x^2-14x+49

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Solution for 2x^2-11x+21=x^2-14x+49 equation: 


Simplifying
2x2 + -11x + 21 = x2 + -14x + 49

Reorder the terms:
21 + -11x + 2x2 = x2 + -14x + 49

Reorder the terms:
21 + -11x + 2x2 = 49 + -14x + x2

Solving
21 + -11x + 2x2 = 49 + -14x + x2

Solving for variable 'x'.

Reorder the terms:
21 + -49 + -11x + 14x + 2x2 + -1x2 = 49 + -14x + x2 + -49 + 14x + -1x2

Combine like terms: 21 + -49 = -28
-28 + -11x + 14x + 2x2 + -1x2 = 49 + -14x + x2 + -49 + 14x + -1x2

Combine like terms: -11x + 14x = 3x
-28 + 3x + 2x2 + -1x2 = 49 + -14x + x2 + -49 + 14x + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
-28 + 3x + 1x2 = 49 + -14x + x2 + -49 + 14x + -1x2

Reorder the terms:
-28 + 3x + 1x2 = 49 + -49 + -14x + 14x + x2 + -1x2

Combine like terms: 49 + -49 = 0
-28 + 3x + 1x2 = 0 + -14x + 14x + x2 + -1x2
-28 + 3x + 1x2 = -14x + 14x + x2 + -1x2

Combine like terms: -14x + 14x = 0
-28 + 3x + 1x2 = 0 + x2 + -1x2
-28 + 3x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-28 + 3x + 1x2 = 0

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


Subproblem 1
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

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 = {-7, 4}

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