Question

# 11. सरल कीजिए : (685+4.16) + (68.5-4.16) 685x685+4.16x4.16 (1) 1 (2) 2 (3) 1125 (4) 685

Solution

11. (2) (68.5+4.16)2 +(685-4.162
685x 68.5+ 4.16 x 4.16
ART 68.5 = a 24 4.16 = b
.: 240196 = (a + b)2 + (a - b)2
a² +6²
_a+b+ 2ab + a2 + b2 - 2ab
a’+b?
2(a + b )
ca +62) = 2