If a = 7, b=5 and c=3, what is the value of 3b2 (3b squared)

75

Step-by-step explanation:

3 * (5) squared becomes 3 * 25=75

225

Step-by-step explanation:

You are only paying attention to B in this.

3b also means 3 multiplied by b or in this case 3 multiplied by 5, which is 15

Then you would have 15 with an exponent of 2

For exponents you multiply the original number by itself for the number of exponents (2 = n multiplied by itself)

This would mean that you would have to do 15 by 15 getting your answer of 225