Answer:
The answer shoule be C.
Explanation:
Step 1 :
Equation at the end of step 1 :
(2q • (q + 9) • 2) • (6q - 5) = 0
Step 2 :
Equation at the end of step 2 :
4q • (q + 9) • (6q - 5) = 0
Step 3 :
Equation at the end of step 3 :
4q • (q + 9) • (6q - 5) = 0
Step 4 :
Theory - Roots of a product :
4.1 A product of several terms equals zero.
When a product of two or more terms equals zero, then at least one of the terms must be zero.
We shall now solve each term = 0 separately
In other words, we are going to solve as many equations as there are terms in the product
Any solution of term = 0 solves product = 0 as well.
Solving a Single Variable Equation :
4.2 Solve : 4q = 0
Divide both sides of the equation by 4:
q = 0
Solving a Single Variable Equation :
4.3 Solve : q+9 = 0
Subtract 9 from both sides of the equation :
q = -9
Solving a Single Variable Equation :
4.4 Solve : 6q-5 = 0
Add 5 to both sides of the equation :
6q = 5
Divide both sides of the equation by 6:
q = 5/6 = 0.833