Question

simplify

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

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Answer 1

(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+2xy+2yz+2xz

=x²+2xy+y²+2yz+z²+2xz

here your answer

hope it helps you

Answer 2

Step-by-step explanation:

• x^2 +xy + xz + xy + y^2 + yz + xz + yz + z^2
• x^2 + y^2 + z^2 + 2xy + 2yz + 2xz
• ( x+ y+z )^2

because we know that, this formula:-

• ( a+b+c ) ^2 = a^2 +b^2 + c^2 + 2ab +2bc + 2ac

I hope this will be useful to u

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