Question

) (9x + 2y +z) power 2​

Answer 1

Solution:

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We know the algebraic identity:

(a+b+c)²

= a²+b²+c²+2ab+2bc+2ca

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Here,

(9x+2y+z)²

=(9x)²+(2y)²+z²+2(9x)(2y)+2(2y)z+2*z*(9x)

= 81x²+4y²+z²+36xy+4yz+18zx

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Answer 2

Answer:

Step-by-step explanation: