a-9x^2y + 15xy^2
b-xy- 3x+ y -3
c-a^2 - 4b^2
a) 9x²y + 15xy² = 3xy.(3x + 5y)
b) xy - 3x + y - 3 = x.(y - 3) + (y - 3) = (y - 3).(x + 1)
c) a² - 4b² = (a + 2b)(a - 2b)
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a) 9x²y + 15xy² = 3xy.(3x + 5y)
b) xy - 3x + y - 3 = x.(y - 3) + (y - 3) = (y - 3).(x + 1)
c) a² - 4b² = (a + 2b)(a - 2b)