Question

Expand (x+y+z)square with full explanation
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Answer 1

Step-by-step explanation:

xsquare+ Ysquare+ zsquare+2xy+2yz+2zx

this is a formula of maths in class 9th ncert book.

Answer 2

Answer:

(X+y+z)² = (x+y+z)(x+y+z)

              = x(x+y+z)+y(x+y+z)+z(x+y+z)

              = x²+xy+xz+xy+y²+yz+xz+yz+z²

              =x²+y²+z²+xy+xy+xz+xz+yz+yz

              =x²+y²+z²+2xy+2yz+2zx

Hence answer is x²+y²+z²+2xy+2yz+2zx.

Hope you understand it ..

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