(7x-3)(x+7)=0

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Solution for (7x-3)(x+7)=0 equation:


Simplifying
(7x + -3)(x + 7) = 0

Reorder the terms:
(-3 + 7x)(x + 7) = 0

Reorder the terms:
(-3 + 7x)(7 + x) = 0

Multiply (-3 + 7x) * (7 + x)
(-3(7 + x) + 7x * (7 + x)) = 0
((7 * -3 + x * -3) + 7x * (7 + x)) = 0
((-21 + -3x) + 7x * (7 + x)) = 0
(-21 + -3x + (7 * 7x + x * 7x)) = 0
(-21 + -3x + (49x + 7x2)) = 0

Combine like terms: -3x + 49x = 46x
(-21 + 46x + 7x2) = 0

Solving
-21 + 46x + 7x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -1x)(3 + -7x) = 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 '(3 + -7x)' equal to zero and attempt to solve:

Simplifying
3 + -7x = 0

Solving
3 + -7x = 0

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

Add '-3' to each side of the equation.
3 + -3 + -7x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -7x = 0 + -3
-7x = 0 + -3

Combine like terms: 0 + -3 = -3
-7x = -3

Divide each side by '-7'.
x = 0.4285714286

Simplifying
x = 0.4285714286
Solution
x = {-7, 0.4285714286}

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