tolong dijawab dong besok mau dikumpul

a. x² - 49 = (x + 7) (x - 7)
b. 4x² - y² = (2x + y) (2x - y)
c. x² - 1 = (x + 1) (x - 1)
d. a^4 - 16
= (a² + 4) (a² - 4)
= (a² + 4) (a + 2) (a - 2)
e. Soalny agk krg jls, nti km komen aj soalny ap trs ak jwb
f. p^4 - q^4
= (p² + q²) (p² - q²)
= (p² + q²) (p + q) (p - q)