Practice
Factor using Difference of Two Squares.a) 16x2 −81y2
(4x +9y)(4x −9y)
(4x +9y)(4x −9y)
b) 49x4 −64y8
(7x2 +8y4)(7x2 −8y4)
(7x2 +8y4)(7x2 −8y4)
c) 81x4 −121y2
(9x2 +11y)(9x2 −11y)
(9x2 +11y)(9x2 −11y)
d) 4x12 −25y2
(2x6 +5y)(2x6 −5y)
(2x6 +5y)(2x6 −5y)
e) 81x2 −4y2
(9x +2y)(9x −2y)
(9x +2y)(9x −2y)
f) 81x8 −64y2
(9x4 +8y)(9x4 −8y)
(9x4 +8y)(9x4 −8y)
g) 49x4 −144y8
(7x2 +12y4)(7x2 −12y4)
(7x2 +12y4)(7x2 −12y4)
h) 9x2 −121y2
(3x +11y)(3x −11y)
(3x +11y)(3x −11y)
i) 16x2 −9y2
(4x +3y)(4x −3y)
(4x +3y)(4x −3y)
j) 16x2 −81y2
(4x +9y)(4x −9y)
(4x +9y)(4x −9y)