4x^2-21x+13=-8x+4

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Solution for 4x^2-21x+13=-8x+4 equation: 


Simplifying
4x2 + -21x + 13 = -8x + 4

Reorder the terms:
13 + -21x + 4x2 = -8x + 4

Reorder the terms:
13 + -21x + 4x2 = 4 + -8x

Solving
13 + -21x + 4x2 = 4 + -8x

Solving for variable 'x'.

Reorder the terms:
13 + -4 + -21x + 8x + 4x2 = 4 + -8x + -4 + 8x

Combine like terms: 13 + -4 = 9
9 + -21x + 8x + 4x2 = 4 + -8x + -4 + 8x

Combine like terms: -21x + 8x = -13x
9 + -13x + 4x2 = 4 + -8x + -4 + 8x

Reorder the terms:
9 + -13x + 4x2 = 4 + -4 + -8x + 8x

Combine like terms: 4 + -4 = 0
9 + -13x + 4x2 = 0 + -8x + 8x
9 + -13x + 4x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
9 + -13x + 4x2 = 0

Factor a trinomial.
(1 + -1x)(9 + -4x) = 0


Subproblem 1
Set the factor '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -1x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1x = 0 + -1
-1x = 0 + -1

Combine like terms: 0 + -1 = -1
-1x = -1

Divide each side by '-1'.
x = 1

Simplifying
x = 1

Subproblem 2
Set the factor '(9 + -4x)' equal to zero and attempt to solve:

Simplifying
9 + -4x = 0

Solving
9 + -4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -4x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -4x = 0 + -9
-4x = 0 + -9

Combine like terms: 0 + -9 = -9
-4x = -9

Divide each side by '-4'.
x = 2.25

Simplifying
x = 2.25
Solution
x = {1, 2.25}

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