Question

Find the value of the expression. b2 − a for a = 4 and b = 5

Answer 1

Answer: 21

Step-by-step explanation: To solve this problem we will substitute b to equal 5 and a to equal 4.

b2 - a

Plug in the values for b and a

5^2 - 4    (Solve 5^2 5 x 5 = 25)

25 - 4 (Subtract)

21 is the value of the expression.

Answer 2

Answer:

$21$

Step-by-step explanation:

Step 1:  Set a to 4 and b to 5

$b^2-a$

$(5)^2-(4)$

$25-4$

$21$

Answer:  $21$