a) 9ax+12ay = 3a(3x+4y)
б) 9/25х^2-4/49y^2 = (3/5х-2/7y)(3/5х+2/7y)
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a) 9ax+12ay = 3a(3x+4y)
б) 9/25х^2-4/49y^2 = (3/5х-2/7y)(3/5х+2/7y)