Question

What is the value of the expression when a = 4 and b = 2? 2a^3+2b^2

Answer 1

a = 4
b = 2

means you can replace "a" with 4
and "b" with 2

Answer 2

so if a = 4, what is 2a^3?

Answer 3

24^3

Answer 4

good, so 2a^3 = 2(4^3) which equals...?

Answer 5

B.80?

Answer 6

nope

Answer 7

what is 4^3?

Answer 8

12?

Answer 9

@Vocaloid

Answer 10

nope, remember that ^ means an exponent

Answer 11

4^3 means we multiply 4 by itself 3 times

so 4^3 = 4*4*4 = ?

Answer 12

64

Answer 13

@Vocaloid

Answer 14

good, now what is

2(64)?

Answer 15

128

Answer 16

@Vocaloid

Answer 17

good.

now, if b = 2, what is 2(b^2)?

Answer 18

2*2=4

Answer 19

@Vocaloid

Answer 20

So my answer is C.120?

Answer 21

nope

Answer 22

Because, 116+4=120

Answer 23

2*b^2 = 2*b*b = ?

Answer 24

2*b^2=8

Answer 25

right?

Answer 26

good.

now for the first part we got 128
and for the second part we got 8

now add them together

Answer 27

Ahhhhh Makes sense. 136. The answer is D