Assignment:
Answer the following questions:
a. Find P(-1/2) if P(x) = x4 + 3x2 + 2
b. Simplify (x2 + y2 + 4z2 + 2xy + 4yz + 4zx) + (x2 + 4y2 + 4z2 - 4xy - 8yz + 4zx)
c. Simplify (3x + 2y)^2
d. Find the product (x + 9) (x - 4)
Provide complete and step by step solution for the question and show calculations and use formulas.