Question

Question 4 plzz answer this

Answer 1

hope it helps .........

Answer 2

hope this answer helps you

z-3 =0
z = 3

a(3)³ + 4(3)² + 3(3) - 4 = (3)³ - 4(3) +a
27a + 36 + 9 - 4 = 27 -12 + a
27a + 41 = 15 + a
27a - a = 15 - 41
26a = -26
a = -26/26
a = 1