4) Match the polynomial with its factored form.
a. (a - b)(a - b)
b. (a + b)(a - b)
c. (a+b) (a²-ab+6²)
d. (a-b) (a² + ab +6²)
e. (a + b)(a + b)
a³ - 6³
a³ + b³
a²-6²
a² + 2ab + b²
a² - 2ab + b²