Practice
Factor using Difference of Two Squares.a) 49x2 −4
(7x +2)(7x −2)
(7x +2)(7x −2)
b) 81x4 −4
(9x2 +2)(9x2 −2)
(9x2 +2)(9x2 −2)
c) 4x2 −225
(2x +15)(2x −15)
(2x +15)(2x −15)
d) 49x2 −81
(7x +9)(7x −9)
(7x +9)(7x −9)
e) 16x4 −169
(4x2 +13)(4x2 −13)
(4x2 +13)(4x2 −13)
f) 64x2 −225
(8x +15)(8x −15)
(8x +15)(8x −15)
g) 4x4 −9
(2x2 +3)(2x2 −3)
(2x2 +3)(2x2 −3)
h) 49x2 −121
(7x +11)(7x −11)
(7x +11)(7x −11)
i) 81x2 −121
(9x +11)(9x −11)
(9x +11)(9x −11)
j) 25x4 −49
(5x2 +7)(5x2 −7)
(5x2 +7)(5x2 −7)