a во 2 степени - 3аб a во 2 степени 6б во 2
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5 10б а
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5 10б а
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Verified answer
(а² -3ab)/5 : [ а² /10b ] + [ 6b² / a ] == [ a(a-3b) / 5 ] * [ (5*2b) / (a*a) ] + [6b²/a ] =
= [ (5a * 2b(a-3b) ) / (5a *a ) ] + [6b² /a ]=
= [ (2b(a-3b) / a ] + [6b²/a ]=
= (2ab - 6b² +6b²) / a = 2ab/a =
= 2b/1 = 2b