Ответ:
1) 3(а+b)+8=3a+3b+8
2) 3x2-12=0
x1=2
x2=-2
3) 2(x+3) =5-6x
2x+6x=5-6
x=-1\8
4)
5)
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Ответ:
1) 3(а+b)+8=3a+3b+8
2) 3x2-12=0
x1=2
x2=-2
3) 2(x+3) =5-6x
2x+6x=5-6
x=-1\8
4)
5)