Practice
Factor using Difference of Two Squares.a) 4x2 −81y2
(2x +9y)(2x −9y)
(2x +9y)(2x −9y)
b) 25x2 −16y2
(5x +4y)(5x −4y)
(5x +4y)(5x −4y)
c) 16x2 −121y8
(4x +11y4)(4x −11y4)
(4x +11y4)(4x −11y4)
d) 49x2 −169y2
(7x +13y)(7x −13y)
(7x +13y)(7x −13y)
e) 81x2 −169y2
(9x +13y)(9x −13y)
(9x +13y)(9x −13y)
f) 49x2 −121y12
(7x +11y6)(7x −11y6)
(7x +11y6)(7x −11y6)
g) 64x2 −121y8
(8x +11y4)(8x −11y4)
(8x +11y4)(8x −11y4)
h) 25x2 −49y2
(5x +7y)(5x −7y)
(5x +7y)(5x −7y)
i) 81x2 −49y2
(9x +7y)(9x −7y)
(9x +7y)(9x −7y)
j) 49x2 −121y2
(7x +11y)(7x −11y)
(7x +11y)(7x −11y)