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TEA [102]
3 years ago
12

What is the value of this expression below when z=3 10z^2-2z-2

Mathematics
2 answers:
prohojiy [21]3 years ago
5 0

Answer:

82

Step-by-step explanation:

10z^2-2z-2

10x3^2-2x3-2

90-6-2

90-8

82

Vinvika [58]3 years ago
5 0

Answer:

82

Step-by-step explanation:

Evaluate 10z² - 2z - 2 where z = 3:

\longrightarrow 10z² - 2z - 2 = 10 × 3² - 2 × 3 - 2

3² = 9:

\longrightarrow 10 × 9 - 2 × 3 - 2

10 × 9 = 90:

\longrightarrow 90 - 2 × 3 - 2

-2 × 3 = -6:

\longrightarrow 90 - 6 - 2

90 - 6 - 2 = 90 - (6 + 2):

\longrightarrow 90 - (6 + 2)

6 + 2 = 8:

\longrightarrow 90 - 8

\longrightarrow 82

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Answer:

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