Напишите решение и ответ.
1. Раскройте скобки:
1) (2p+3q)(3p+2q)
2) (m+n)(m-2n)
3) (x-2)(x-1)x(x+1)(x+2)
2. Найдите значение выражения
2a-3b+4c:
а) при а= -0,7; b=9,2; c=5,4;
b) при a= 26,3; b= -14,8; c=11,2
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