Practice
Factor using Difference of Two Squares.a) 81x2 −49y4
(9x +7y2)(9x −7y2)
(9x +7y2)(9x −7y2)
b) 49x2 −64y2
(7x +8y)(7x −8y)
(7x +8y)(7x −8y)
c) 9x2 −100y2
(3x +10y)(3x −10y)
(3x +10y)(3x −10y)
d) 81x2 −169y12
(9x +13y6)(9x −13y6)
(9x +13y6)(9x −13y6)
e) 9x2 −100y2
(3x +10y)(3x −10y)
(3x +10y)(3x −10y)
f) 4x2 −225y2
(2x +15y)(2x −15y)
(2x +15y)(2x −15y)
g) 49x2 −225y2
(7x +15y)(7x −15y)
(7x +15y)(7x −15y)
h) 25x2 −49y2
(5x +7y)(5x −7y)
(5x +7y)(5x −7y)
i) 25x2 −36y4
(5x +6y2)(5x −6y2)
(5x +6y2)(5x −6y2)
j) 16x2 −49y4
(4x +7y2)(4x −7y2)
(4x +7y2)(4x −7y2)