Question

Evaluate 2x(second power)-1 when x = 3.
А. 35
В. 5
C. 25
D. 17

Answer 1

Answer:

Option D, 17

Step-by-step explanation:

Step 1:  Set x to 3

$2x^2 - 1$

$2(3)^2 - 1$

$2(9) - 1$

$18 - 1$

$17$

Answer: Option D, 17

Answer 2

Answer:

The answer is 17

Step-by-step explanation:

2x² - 1

When x = 3

2(3²) - 1

2*9 - 1

18 - 1

= 17