Question

(z2+4)(z2-5) find the product

Answer 1

Answer:

Step-by-step explanation:

(z² + 4) (z² - 5)

= z² (z²-5) + 4(z² -5)

= z4 - 5z² + 4z² -20

= z4 - z² - 20

Answer 2

Step-by-step explanation:

hope it helps