3 years ago

If z = 2, find the value of: a. 6z2–2z+5 b. 64–5z

Mathematics

1 answer:

Ludmilka [50]3 years ago

4 0

Answer:

25 and 54

Step-by-step explanation:

(a)

6z² - 2z + 5 ← substitute z = 2

= 6(2)² - 2(2) + 5

= 6(4) - 4 + 5

= 24 - 4 + 5

= 20 + 5

= 25

(b)

64 - 5z ← substitute z = 2

= 64 - 5(2)

= 64 - 10

= 54

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