Practice
Factor using Difference of Two Squares.a) 49x4 −144
(7x2 +12)(7x2 −12)
(7x2 +12)(7x2 −12)
b) 4x2 −25
(2x +5)(2x −5)
(2x +5)(2x −5)
c) 25x2 −81
(5x +9)(5x −9)
(5x +9)(5x −9)
d) 49x2 −36
(7x +6)(7x −6)
(7x +6)(7x −6)
e) 64x2 −49
(8x +7)(8x −7)
(8x +7)(8x −7)
f) 49x2 −64
(7x +8)(7x −8)
(7x +8)(7x −8)
g) 81x8 −121
(9x4 +11)(9x4 −11)
(9x4 +11)(9x4 −11)
h) 64x2 −169
(8x +13)(8x −13)
(8x +13)(8x −13)
i) 49x2 −81
(7x +9)(7x −9)
(7x +9)(7x −9)
j) 64x2 −9
(8x +3)(8x −3)
(8x +3)(8x −3)