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ale4655 [162]
3 years ago
14

If a = 2 and b = -3, find the value of a3 - b2. A.-31 B.-23 C.-1 D.15

Mathematics
2 answers:
adelina 88 [10]3 years ago
4 0

Plug in -3 for b, and 2 for a

2^3 - (-3)^2

Remember to always follow PEMDAS. First, do the exponents

2^3 = 2 x 2 x 2 = 8

(-3)^2 = -3 x -3 = 9

Subtract

8 - 9 = -1

-1 is your answer

hope this helps

valentinak56 [21]3 years ago
3 0

Hello!

So let's first start out by solving the left side of the equation:

2 to the third power is 8

The right side now: -3 to the second power is -9

In total: 8- (-9)

So your answer is C) -1

I hope it helps!

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