Question

Which answer shows correct substitution into the expression 362 - (b + 4) when b = 5?

O (3.5)2 – 5+4
O (3.5)2 – (5+4)
O 3(5)2 – (5+4)
O 3 . 52 - 5+4

Answer 1

3b²-(b + 4) = 3(5)²-(5 + 4)

Explanation:

The given expression is :

3b²-(b + 4)

We need to given an expression when the value of b is 5.

Put b = 5 in the above expression.

3b²-(b + 4) = 3(5)²-(5 + 4)

We can also solve it as follows :

= 3(25)-(9)

= 75-9

= 66

Hence, option (c) will be the answer.