Practice
Factor using Difference of Two Squares.a) 49x2 −64
(7x +8)(7x −8)
(7x +8)(7x −8)
b) 81x2 −25
(9x +5)(9x −5)
(9x +5)(9x −5)
c) 25x2 −36
(5x +6)(5x −6)
(5x +6)(5x −6)
d) 16x2 −225
(4x +15)(4x −15)
(4x +15)(4x −15)
e) 4x2 −225
(2x +15)(2x −15)
(2x +15)(2x −15)
f) 81x4 −49
(9x2 +7)(9x2 −7)
(9x2 +7)(9x2 −7)
g) 49x2 −169
(7x +13)(7x −13)
(7x +13)(7x −13)
h) 25x2 −81
(5x +9)(5x −9)
(5x +9)(5x −9)
i) 49x2 −9
(7x +3)(7x −3)
(7x +3)(7x −3)
j) 64x2 −169
(8x +13)(8x −13)
(8x +13)(8x −13)