Question

The variables X, Y, and Z represent polynomials where X = a, Y = 3a – 5, and Z = a2 + 2. What is X2Y – Z in simplest form?

2a2 – 5a – 2

3a3 – 6a2 – 2

–3a3 – 2

–3a2 – 2

Answer 1

substitute a for X, 3a - 5 for Y, and a^2 + 2 for Z then calculate X^2 * Y - Z