Practice
Factor using Difference of Two Squares.a) 81x4 −121
(9x2 +11)(9x2 −11)
(9x2 +11)(9x2 −11)
b) 49x2 −36
(7x +6)(7x −6)
(7x +6)(7x −6)
c) 49x2 −100
(7x +10)(7x −10)
(7x +10)(7x −10)
d) 36x2 −121
(6x +11)(6x −11)
(6x +11)(6x −11)
e) 25x2 −81
(5x +9)(5x −9)
(5x +9)(5x −9)
f) 81x4 −196
(9x2 +14)(9x2 −14)
(9x2 +14)(9x2 −14)
g) 49x2 −169
(7x +13)(7x −13)
(7x +13)(7x −13)
h) 64x4 −121
(8x2 +11)(8x2 −11)
(8x2 +11)(8x2 −11)
i) 49x2 −4
(7x +2)(7x −2)
(7x +2)(7x −2)
j) 9x4 −25
(3x2 +5)(3x2 −5)
(3x2 +5)(3x2 −5)