Answer:
Step-by-step explanation:
Answer:
C.
Step-by-step explanation:
The answer is: (z - 6)(z + 15)
z² + 9z - 90 = z*z + 15z - 6z - 6*15 =
= (z*z + 15z) - (6z + 6*15) =
= z(z + 15) - 6(z + 15) =
= (z - 6)(z + 15)
Answer:
17/20.........................
Answer:
1.a
2.a
3.d
4.c
5.c
Step-by-step explanation:
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