Question

write ( 9x + 2y + z )square in expanded form

Answer 1

${9x}^{2} + {2y}^{2} + {z}^{2} + 2 \times 9x \times 2y + 2 \times 2y \times z + 2 \times z \times 9x$
=81xsquare+4ysquare+zsquare +36xy+4yz+18zx

Answer 2

Step-by-step explanation:

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