Practice
Factor using Difference of Two Squares.a) 81x2 −49y2
(9x +7y)(9x −7y)
(9x +7y)(9x −7y)
b) 64x2 −121y2
(8x +11y)(8x −11y)
(8x +11y)(8x −11y)
c) 36x2 −49y2
(6x +7y)(6x −7y)
(6x +7y)(6x −7y)
d) 16x4 −225y2
(4x2 +15y)(4x2 −15y)
(4x2 +15y)(4x2 −15y)
e) 81x2 −4y2
(9x +2y)(9x −2y)
(9x +2y)(9x −2y)
f) 25x2 −49y8
(5x +7y4)(5x −7y4)
(5x +7y4)(5x −7y4)
g) 49x2 −81y2
(7x +9y)(7x −9y)
(7x +9y)(7x −9y)
h) 25x12 −81y2
(5x6 +9y)(5x6 −9y)
(5x6 +9y)(5x6 −9y)
i) 25x2 −81y8
(5x +9y4)(5x −9y4)
(5x +9y4)(5x −9y4)
j) 9x2 −4y2
(3x +2y)(3x −2y)
(3x +2y)(3x −2y)