Answer:
x = -7 and x = 5
Explanation:
First, make the problem easier by taking out the common factor (6).
6x² - 12x - 210 -----> 6(x² - 2x - 35)
What two numbers multiply to -35 and add to -2? These two numbers are -7 and 5. You can now write the factored form of the expression.
6(x² - 2x - 35) -----> 6(x - 7)(x + 5)
Finally, find the x's by making each term with x equal to zero.
x + 7 = 0 -----> x = -7
x - 5 = 0 -----> x = 5
The x's are x = -7 and x = 5