Упростить выражение
1)(a-5)^2+9(a-2)
2)2(b-3)^2+12b
3)(a+6)^2+(3a-1)(3a+1)
4)(b+4)^2+(2b-5)(2b+5)
1)2) 3) 4)
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Answers & Comments
1)
2)
3)
4)