2. Спрости вираз:
а) (6x – бу – 8z) - (5х + Ту- 3z) +
+ (5z - 8х + y);
б) (4а - ба? - 2а + 7)-(5а+ 3а
— 2а + 7а) - (За' - 2a+a'-
— За) + 9а.
а) (6x – бу – 8z) - (5х + Ту- 3z) +
+ (5z - 8х + y);
б) (4а - ба? - 2а + 7)-(5а+ 3а
— 2а + 7а) - (За' - 2a+a'-
— За) + 9а.
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Answers & Comments
a)(6x-5y-8z)-(5x+7y-3z)+(5z-8x+y)=6x-5y-8z-5x-7y+3z+5z-8x+y=-7x-11y+0=-7x-11y; б)(4a³-5a²-2a+7)-(5a⁴+3a³-2a²+7a)-(3a^5-2a⁴+a³-3a²)+9a=4a³-5a²-2a+7-5a⁴-3a³+2a²-7a-3a^5+2a⁴-a³+3a²+9a=7-3a⁴-3a^5.