PGM1

We are given the expression x³ - 2y² - 3x³ + z⁴. We have to evaluate it at a given set of x, y, and z values. Before then, let's combine like terms.x³ - 2y² - 3x³ + z⁴= -2x³ - 2y² + z⁴ <-- by combining like termsNow we evaluate for x=3 y=5 z = -3= -2(3³) - 2(5²) + (-3⁴) <-- by putting in for x, y, z= -2(27) - 2(25) + 81 <--- parentheses and exponents first in order of operations= -54 - 50 + 81 <---- multiplication is next= -4 + 81 = 77Thus, we evaluate and it's 77.