math
posted by anonymous .
Please check.
(6m^2n+3mn^25mn+2)+(4m^2n+2mn^26mn9)
Answer: 2m^2n+5mn^211mn7
(2x^43x^2+7x)(5x^3+2x^23x+5)
Answer: 2x^45x^35x^2+10x5
(a8)(a1)
Answer: a^29a+8
(z+6)^2
Answer: z^2+12z+36
(5x+2y)^2
Answer: 25x^2+20xy+4y^2
Is that order okay? Does it matter?
(2x7)(2x+7)
Answer: 4x^249

Yes, your answers look correct! The order is okay. The polynomial is usually arranged so that the exponent of one variable is in increasing or decreasing order.
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