a) 25y^2-36=(5у-6)(5у+6)
б) (4а-с)^3=64а³-12а²с+12ас²-с³
в) (5х+3y)^2=25х²+30ху+9у²
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a) 25y^2-36=(5у-6)(5у+6)
б) (4а-с)^3=64а³-12а²с+12ас²-с³
в) (5х+3y)^2=25х²+30ху+9у²