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What is the value of the expression when a = 3 and b = 2? 3a^3 + 2b^3 -- A. 78 B. 97 C. 135 D. 745 Please don't respond with the answer alone, I'd like to know how to work through it. :)
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May 24, 2017
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What is the value of the expression when a = 3 and b = 2?
3a^3 + 2b^3
--
A. 78
B. 97
C. 135
D. 745
Please don't respond with the answer alone, I'd like to know how to work through it. :)
Mathematics
high-school
Igustin
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Igustin
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3a³ + 2b³ = ?
Substitute for values:
3a³ + 2b³
a = 3
3 × 3³ + 2b³
b = 2
3a³ + 2 × 2³
Full question:
3 × 3³ + 2 × 2³
3 × 3³ + 2 × 2³
3 × 27 + 2 × 2³
3 × 27 + 2 × 8
81 + 16
97
The value of the expression 3a³ + 2b³ when a = 3 and b = 2 is 97.
3 × 3³ + 2 × 2³ = 97
Robert Hume
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May 28, 2017
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Robert Hume
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