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9 votes
9 votes
Which expression has the greatest value when x=3

Which expression has the greatest value when x=3-example-1
User Shannan
by
2.1k points

1 Answer

16 votes
16 votes

Answer:

The third expression: (2x)^3

Explanation:

Plug in 3 for x in each expression

2x^3

2(3)^3

Use PEMDAS

2 (3 × 3 × 3)

2 (9 × 3)

2 (27)

54

2x^3 + 5

(The last expression told us 2x^3 = 54 so feel free to use this information to make life easier)

54 + 5

59

(2x)^3

(2 × 3)^3

Use PEMDAS

6^3

6 × 6 × 6

36 × 6

216

(x - 1)^3

(3 - 1)^3

Use PEMDAS

2^3

2 × 2 × 2

4 × 2

8

216 is the greatest value so the third expression is the answer

User Oriol Esteban
by
3.0k points
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