1) 7b+(2a-7b²)/b=(7b²+2a-7b²)/b =2a/b=18/12=1,5
2) (a²+4a)/(a²+8a+16) = a(a+4)/(a+4)²=
=a/(a+4)=-2/2=-1
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1) 7b+(2a-7b²)/b=(7b²+2a-7b²)/b =2a/b=18/12=1,5
2) (a²+4a)/(a²+8a+16) = a(a+4)/(a+4)²=
=a/(a+4)=-2/2=-1