(6-2x)(15+5x)=

Solution for (6-2x)(15+5x)= equation:

Simplifying
(6 + -2x)(15 + 5x) = 0

Multiply (6 + -2x) * (15 + 5x)
(6(15 + 5x) + -2x * (15 + 5x)) = 0
((15 * 6 + 5x * 6) + -2x * (15 + 5x)) = 0
((90 + 30x) + -2x * (15 + 5x)) = 0
(90 + 30x + (15 * -2x + 5x * -2x)) = 0
(90 + 30x + (-30x + -10x2)) = 0

Combine like terms: 30x + -30x = 0
(90 + 0 + -10x2) = 0
(90 + -10x2) = 0

Solving
90 + -10x2 = 0

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + -10x2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -10x2 = 0 + -90
-10x2 = 0 + -90

Combine like terms: 0 + -90 = -90
-10x2 = -90

Divide each side by '-10'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}