Resolva detalhadamente as expressões:
a)
a² + 4a (para a = 2/3)
b) 5a²
+ 3ab (para a = -3 e b = 4)
a)
a² + 4a (para a = 2/3)
b) 5a²
+ 3ab (para a = -3 e b = 4)
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(2/3)² + 4(2/3) =
4/6 + 8/3 =
4/6 + 16/6 =
20/6² = 10/3 OU 3,33333333
5A² + 3AB =
5(-3)² +3(-3)4 =
5*9 + (-36) =
45 - 36 = 9