Question

Спростити терміни і привести
зразок для x = 2; y = 1 .

д)10x+5y-(x-y-2)+(2y-9)
е)(5x-6)-7x+y-(9+3x+2y)
Спростити і позбавити дужок
a)18x- {6-[10x+(4+10)-12]+18x}
b)4x-(6x+2)-[14-(12x+22)]+8x
Повне розв'язання будь ласка
30 балів
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Answer 1

Ответ:

д) 10x + 5y - (x - y - 2) + (2y - 9)

= 10 * 2 + 5 * 1 - (2 - 1 - 2) + (2 * 1 - 9)

= 20 + 5 - (1 - 1 - 2) + (2 - 9)

= 20 + 5 - (-2) + (-7)

= 25 + 2 - 7

= 27 - 7

= 20

е) (5x - 6) - 7x + y - (9 + 3x + 2y)

= 5 * 2 - 6 - 7 * 2 + 1 - (9 + 3 * 2 + 2 * 1)

= 10 - 6 - 14 + 1 - (9 + 6 + 2)

= 4 - 14 + 1 - 17

= -10 + 1 - 17

= -9 - 17

= -26

a) 18x - {6 - [10x + (4 + 10) - 12] + 18x}

= 18 * 2 - {6 - [10 * 2 + (4 + 10) - 12] + 18 * 2}

= 36 - {6 - [20 + 14 - 12] + 36}

= 36 - {6 - [20 + 2] + 36}

= 36 - {6 - 22 + 36}

= 36 - {6 - 22 + 36}

= 36 - {40}

= 36 - 40

= -4

b) 4x - (6x + 2) - [14 - (12x + 22)] + 8x

= 4 * 2 - (6 * 2 + 2) - [14 - (12 * 2 + 22)] + 8 * 2

= 8 - (12 + 2) - [14 - (24 + 22)] + 16

= 8 - 14 - [14 - (46)] + 16

= 8 - 14 - [14 - 46] + 16

= 8 - 14 - [-32] + 16

= 8 - 14 + 32 + 16

= -6 + 32 + 16

= 26 + 16

= 42