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b. 16x²-100y² = (4x+10y)(4x-10y)
c. (a+b)²-9 = ((a+b)+3)((a+b)-3) = (a+b+3)(a+b-3)
d. 16q²-225 = (4q+15)(4q-15)
b) (4x+10y)(4x-10y)
c) (a+b)² - 3² = ((a+b)+3)((a+b)-3)
d) (4q+15)(4q-15)