Which of the following is difference of two square?
a. a² - 25
b. 9 - a³
c. -81a⁴ - 10
d. 4a² - 11

Which of the following is perfect square trinomial?
a. a² + 16a + 4
b. 9a² + 24a + 20
c. 100a² + 120ab + 50
d. a² + 10a + 25​

pakisagot po ng tama please or I will report you