16 = -5 + z/4
21 = z/4
21*4 = z
z = 84
Answer:
2/x+1
Step-by-step explanation:
Answer:
a = 2
Step-by-step explanation:
given x = - 1 is a zero then f(- 1) = 0 , that is
a(- 1)³ - (- 1)² - 1 + 4 = 0
- a - 1 - 1 + 4 = 0
- a + 2 = 0 ( subtract 2 from both sides )
- a = - 2 ( multiply both sides by - 1 )
a = 2
I have no idea I just need more points so I can ask more questions