Practice
Factor using Difference of Two Squares.a) 25x2 −4
(5x +2)(5x −2)
(5x +2)(5x −2)
b) 16x4 −49
(4x2 +7)(4x2 −7)
(4x2 +7)(4x2 −7)
c) 25x2 −81
(5x +9)(5x −9)
(5x +9)(5x −9)
d) 4x2 −225
(2x +15)(2x −15)
(2x +15)(2x −15)
e) 49x2 −9
(7x +3)(7x −3)
(7x +3)(7x −3)
f) 49x4 −36
(7x2 +6)(7x2 −6)
(7x2 +6)(7x2 −6)
g) 25x4 −121
(5x2 +11)(5x2 −11)
(5x2 +11)(5x2 −11)
h) 49x2 −4
(7x +2)(7x −2)
(7x +2)(7x −2)
i) 25x2 −64
(5x +8)(5x −8)
(5x +8)(5x −8)
j) 4x2 −81
(2x +9)(2x −9)
(2x +9)(2x −9)