C-03-Q030mediumsingle_mcqSquare of (4x+5y)=?(4x+5y) = ?(4x+5y)=?a16x2+40xy+25y216x^2 + 40xy + 25y^216x2+40xy+25y2b16x2+25y216x^2 + 25y^216x2+25y2c16x2−40xy+25y216x^2 - 40xy + 25y^216x2−40xy+25y2d20x2+40xy+25y220x^2 + 40xy + 25y^220x2+40xy+25y2ব্যাখ্যাApplying (p+q)2=p2+2pq+q2(p+q)^2=p^2+2pq+q^2(p+q)2=p2+2pq+q2 with p=4x, q=5yp=4x,\ q=5yp=4x, q=5y gives 16x2+2(4x)(5y)+25y2=16x2+40xy+25y216x^2+2(4x)(5y)+25y^2=16x^2+40xy+25y^216x2+2(4x)(5y)+25y2=16x2+40xy+25y2.