Practice
Factor using Difference of Two Squares.a) 81x2 −16
(9x +4)(9x −4)
(9x +4)(9x −4)
b) 49x2 −225
(7x +15)(7x −15)
(7x +15)(7x −15)
c) 81x2 −25
(9x +5)(9x −5)
(9x +5)(9x −5)
d) 81x2 −169
(9x +13)(9x −13)
(9x +13)(9x −13)
e) 49x2 −225
(7x +15)(7x −15)
(7x +15)(7x −15)
f) 25x2 −169
(5x +13)(5x −13)
(5x +13)(5x −13)
g) 49x2 −9
(7x +3)(7x −3)
(7x +3)(7x −3)
h) 64x2 −81
(8x +9)(8x −9)
(8x +9)(8x −9)
i) 9x2 −100
(3x +10)(3x −10)
(3x +10)(3x −10)
j) 4x2 −81
(2x +9)(2x −9)
(2x +9)(2x −9)