1. (x+3) (x-2) = x²-2x+3x-6= x²+x-6
2. (2-b)³+b(b²-6b+12) b=-5
b³+6b²-12b+8+b³-6b²+12b=
2b³+8=2×(-5)³+8= 250+8=258
3. 3y-2-7y-4=-4y-6
ответ: 3)
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Answers & Comments
1. (x+3) (x-2) = x²-2x+3x-6= x²+x-6
2. (2-b)³+b(b²-6b+12) b=-5
b³+6b²-12b+8+b³-6b²+12b=
2b³+8=2×(-5)³+8= 250+8=258
3. 3y-2-7y-4=-4y-6
ответ: 3)