10.)which of the following expressions has factors of (4 x -5 y) and (4x + 5y)
a.)16x ^ 2 - 25y ^ 2
b.)16 x ^ 2 + 25 y ^ 2
c.)4x ^ 2 + 5y ^ 2
d.)4x ^ 2 -5 y ^ 2
a.)16x ^ 2 - 25y ^ 2
b.)16 x ^ 2 + 25 y ^ 2
c.)4x ^ 2 + 5y ^ 2
d.)4x ^ 2 -5 y ^ 2
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A 16x^2 -25y^2
SOLUTION:
(4x-5y)(4x+5y)
(4x)(4x)+(-5x)(5y)
16x^2-25y^2