a4+4 এর উৎপাদক কী কী ?
সমাধান
সঠিক উত্তর: Option B
a4+4
= (a²)²+2.a².2+2²-2a².2
= (a²+2)²-(2a)²
= (a²+2+2a)(a²+2-2a)
= (a²+2a+2) (a²-2a+2)
= (a²)²+2.a².2+2²-2a².2
= (a²+2)²-(2a)²
= (a²+2+2a)(a²+2-2a)
= (a²+2a+2) (a²-2a+2)