Ответ:
1. 1
2. 2(x-3y)(x^2+3xy+9y^2)
3. a)-4m+27
b) -4*0,25+27=26
4. a=15
b= 12
1)15^2-12^2=225-144=81
2)15-12=3
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Ответ:
1. 1
2. 2(x-3y)(x^2+3xy+9y^2)
3. a)-4m+27
b) -4*0,25+27=26
4. a=15
b= 12
1)15^2-12^2=225-144=81
2)15-12=3