Question

Find the value of w, given that x = 3, y = 4, z = – 2 and w = x² – y² + z² – xyz

Answer 1

Given: x = 3, y = 4 and z = – 2

w = x² – y² + z² – xyz

w = 3² – 4² + (– 2)² – (3)(4)(– 2)

w = 9 – 16 + 4 + 24

w = 37 – 16

w = 21