1/7а²b*23m -2/7a²bm=1/7 a²bm(23 - 2) = 21:7 a²bm = 3a²bm
5а²-2аb+6a-7ab-6a²-6a= -a² -9ab = -a(a +9b)
a=5 b= -1/9
-5(5 -9x1/9) = -20
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1/7а²b*23m -2/7a²bm=1/7 a²bm(23 - 2) = 21:7 a²bm = 3a²bm
5а²-2аb+6a-7ab-6a²-6a= -a² -9ab = -a(a +9b)
a=5 b= -1/9
-5(5 -9x1/9) = -20