Ответ:
m²-12m+36-m²+4=-12m+40
7y²-21y+y-3+20y²-20=27y²-18y+12+13
20y+18y=23+25
38y=48
y=48/38
(3b+1+b-7)(3b+1-b+7)=(4b-6)(2b+8)
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Ответ:
m²-12m+36-m²+4=-12m+40
7y²-21y+y-3+20y²-20=27y²-18y+12+13
20y+18y=23+25
38y=48
y=48/38
(3b+1+b-7)(3b+1-b+7)=(4b-6)(2b+8)