0=-7x^2-7x+42

Solution for 0=-7x^2-7x+42 equation:

Simplifying
0 = -7x2 + -7x + 42

Reorder the terms:
0 = 42 + -7x + -7x2

Solving
0 = 42 + -7x + -7x2

Solving for variable 'x'.

Combine like terms: 0 + -42 = -42
-42 + 7x + 7x2 = 42 + -7x + -7x2 + -42 + 7x + 7x2

Reorder the terms:
-42 + 7x + 7x2 = 42 + -42 + -7x + 7x + -7x2 + 7x2

Combine like terms: 42 + -42 = 0
-42 + 7x + 7x2 = 0 + -7x + 7x + -7x2 + 7x2
-42 + 7x + 7x2 = -7x + 7x + -7x2 + 7x2

Combine like terms: -7x + 7x = 0
-42 + 7x + 7x2 = 0 + -7x2 + 7x2
-42 + 7x + 7x2 = -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
-42 + 7x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-6 + x + x2) = 0

Factor a trinomial.
7((-3 + -1x)(2 + -1x)) = 0

Ignore the factor 7.
Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve:

Simplifying
-3 + -1x = 0

Solving
-3 + -1x = 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 + -1x = 0 + 3

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

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

Divide each side by '-1'.
x = -3

Simplifying
x = -3
Subproblem 2
Set the factor '(2 + -1x)' equal to zero and attempt to solve:

Simplifying
2 + -1x = 0

Solving
2 + -1x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 0 + -2
-1x = 0 + -2

Combine like terms: 0 + -2 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2
Solution
x = {-3, 2}