Answer:

Step-by-step explanation:
Use formula

Hence,

This expression is equal to

so we can equate the coefficients at powers of x:

Answer:
15
Step-by-step explanation:
substitute the values that are given into the expression.
c + a = x
12 + 3 = x
15 = x
Answer:
x is equal to thirty-two.
Step-by-step explanation:
x(x - 32) = 0
x² - 32x = 0
x - 32 = 0
x = 32