Question

(z-5)(z+9) is equal to

(a) Z

2 +4z -45 (b) Z2

-4z-45 (c) Z

2

-4z+45 (d) Z

2+4z+45
​

Answer 1

Answer:

a) z² + 4z - 45

Step-by-step explanation:

(z - 5)(z + 9) = z² + 9z - 5z - 45

= z² + 4z - 45

Hope it helps you:)