Question

factorise this question ..
quickly please
$(- 3x - 5y)( - 2x - 4y)$
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Answer 1

Step-by-step explanation:

(-3x-5y)(-2x-4y)

-2x(-3x-5y)-4y (-3x-5y)

6x^2+10xy+12xy+20y^2

6x^2+23xy+20^2