সূত্রের সাহায্যে নিচের রাশিগুলোর বর্গ নির্ণয় কর :

Ans :

আমরা জানি,

(a+b+c)2=a2+b2+c2+2ab+2bc+2ca

এখানে, a = xy, b = yz এবং c = – zx ধরে

(xy+yz-zx)2=(xy)2+(yz)2+(-zx)2+2(×xy)×(yz)+2×(yz) × (-zx) + 2×(-zx)×(xy)

= x2y2 + y2z2 +z2x2+2xyz-2xyz2-2x2yz (Ańs.)

3 months ago

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