| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.60 |
| Score | 0% | 72% |
Simplify (9a)(3ab) - (6a2)(2b).
| 96ab2 | |
| 96a2b | |
| -15ab2 | |
| 15a2b |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(9a)(3ab) - (6a2)(2b)
(9 x 3)(a x a x b) - (6 x 2)(a2 x b)
(27)(a1+1 x b) - (12)(a2b)
27a2b - 12a2b
15a2b
What is 2a7 - 9a7?
| -7a7 | |
| 18a14 | |
| 11 | |
| 11a14 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
2a7 - 9a7 = -7a7
What is 2a - 9a?
| a2 | |
| -7a2 | |
| -7a | |
| -7 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
2a - 9a = -7a
Simplify (5a)(5ab) + (9a2)(3b).
| 2ab2 | |
| 52ab2 | |
| 120ab2 | |
| 52a2b |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(5a)(5ab) + (9a2)(3b)
(5 x 5)(a x a x b) + (9 x 3)(a2 x b)
(25)(a1+1 x b) + (27)(a2b)
25a2b + 27a2b
52a2b
What is 2a6 + 6a6?
| 8a6 | |
| -4a12 | |
| -4 | |
| 12a6 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
2a6 + 6a6 = 8a6