Practice
Factor using Difference of Two Squares.a) 81x2 −49
(9x +7)(9x −7)
(9x +7)(9x −7)
b) 16x2 −81
(4x +9)(4x −9)
(4x +9)(4x −9)
c) 9x2 −64
(3x +8)(3x −8)
(3x +8)(3x −8)
d) 16x2 −9
(4x +3)(4x −3)
(4x +3)(4x −3)
e) 36x2 −169
(6x +13)(6x −13)
(6x +13)(6x −13)
f) 49x2 −64
(7x +8)(7x −8)
(7x +8)(7x −8)
g) 64x2 −121
(8x +11)(8x −11)
(8x +11)(8x −11)
h) 25x4 −196
(5x2 +14)(5x2 −14)
(5x2 +14)(5x2 −14)
i) 16x2 −225
(4x +15)(4x −15)
(4x +15)(4x −15)
j) 64x2 −225
(8x +15)(8x −15)
(8x +15)(8x −15)