Let x(a) = ( 2/3 a^3 + 1) and y(a) = (4a^3 + 2a). Which of the following expressions is equivalent to x(a) • (2a) - y(a) ?

Ithink the answer is d.

Each eukaryotic cell has a plasma membrane, cytoplasm, a nucleus, ribosomes, mitochondria, peroxisomes, and in some, vacuoles; however, there are some striking differences between animal and plant cells.