(3x+7)(9x^2-21x+49)=

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Solution for (3x+7)(9x^2-21x+49)= equation:


Simplifying
(3x + 7)(9x2 + -21x + 49) = 0

Reorder the terms:
(7 + 3x)(9x2 + -21x + 49) = 0

Reorder the terms:
(7 + 3x)(49 + -21x + 9x2) = 0

Multiply (7 + 3x) * (49 + -21x + 9x2)
(7(49 + -21x + 9x2) + 3x * (49 + -21x + 9x2)) = 0
((49 * 7 + -21x * 7 + 9x2 * 7) + 3x * (49 + -21x + 9x2)) = 0
((343 + -147x + 63x2) + 3x * (49 + -21x + 9x2)) = 0
(343 + -147x + 63x2 + (49 * 3x + -21x * 3x + 9x2 * 3x)) = 0
(343 + -147x + 63x2 + (147x + -63x2 + 27x3)) = 0

Reorder the terms:
(343 + -147x + 147x + 63x2 + -63x2 + 27x3) = 0

Combine like terms: -147x + 147x = 0
(343 + 0 + 63x2 + -63x2 + 27x3) = 0
(343 + 63x2 + -63x2 + 27x3) = 0

Combine like terms: 63x2 + -63x2 = 0
(343 + 0 + 27x3) = 0
(343 + 27x3) = 0

Solving
343 + 27x3 = 0

Solving for variable 'x'.

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

Add '-343' to each side of the equation.
343 + -343 + 27x3 = 0 + -343

Combine like terms: 343 + -343 = 0
0 + 27x3 = 0 + -343
27x3 = 0 + -343

Combine like terms: 0 + -343 = -343
27x3 = -343

Divide each side by '27'.
x3 = -12.7037037

Simplifying
x3 = -12.7037037

Reorder the terms:
12.7037037 + x3 = -12.7037037 + 12.7037037

Combine like terms: -12.7037037 + 12.7037037 = 0.0000000
12.7037037 + x3 = 0.0000000

The solution to this equation could not be determined.

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