The expanded form of (3x−5)3 is(a) 27x3+135x2+225x−125(b) 27x3+135x2−225x−125(c) 27x3−135x2+225x−125(d) none of these
If 3x+13x=3; find :(i)9x2+19x2(ii)27x3+127x3