Practice
Factor using Difference of Two Squares.a) 16x2 −81y2
(4x +9y)(4x −9y)
(4x +9y)(4x −9y)
b) 81x2 −4y2
(9x +2y)(9x −2y)
(9x +2y)(9x −2y)
c) 49x2 −64y2
(7x +8y)(7x −8y)
(7x +8y)(7x −8y)
d) 81x2 −16y2
(9x +4y)(9x −4y)
(9x +4y)(9x −4y)
e) 4x2 −81y2
(2x +9y)(2x −9y)
(2x +9y)(2x −9y)
f) 4x12 −121y2
(2x6 +11y)(2x6 −11y)
(2x6 +11y)(2x6 −11y)
g) 4x2 −121y2
(2x +11y)(2x −11y)
(2x +11y)(2x −11y)
h) 49x4 −16y2
(7x2 +4y)(7x2 −4y)
(7x2 +4y)(7x2 −4y)
i) 49x2 −121y12
(7x +11y6)(7x −11y6)
(7x +11y6)(7x −11y6)
j) 81x2 −169y2
(9x +13y)(9x −13y)
(9x +13y)(9x −13y)