zaydix09 zaydix09
  • 20-08-2018
  • Mathematics
contestada

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

Respuesta :

aidenh6468
aidenh6468 aidenh6468
  • 20-08-2018

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!

Answer Link
AnimeBrainly
AnimeBrainly AnimeBrainly
  • 20-08-2018

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

Answer Link

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