How many terms are in the expression 4a+a^2+6a^2?

Question

I dont understand how to find out how many terms there are ??

 

Also

 

What is the value of the expression 2(ab)^3-3a+5b if a=3 and b=5?

 

It would be very helpful if you can explain how you did this too

 

Please and Thank you 

Answer 1

A term is a group of numbers and letters. The terms are separated by a +, -, or equals sign. So in this case there would be 3 terms. One term is the 4a, another is the a², and the last is the 6a².

 

Did you intend to include an 'n' in the second expression?

If not, simply plug in 3 for a and 5 for b:

 

2(a³) - 3a + 5b         Substitute 3 for a and 5 for b

2(3³) - 3(3) + 5(5)    Simplify

2(27) - 9 + 25          Simplify again

54 - 9 + 25              Combine all terms

70                           This is the answer.