Which expression is equivalent to `\left(5x^{3}\right)\left(2x^{7}\right)`?
The expression is equivalent to 10x^10.
This can be found by multiplying the coefficients (5 and 2) together to get 10, and adding the exponents of x (3+7) to get x^10.
This can be found by multiplying the coefficients (5 and 2) together to get 10, and adding the exponents of x (3+7) to get x^10.