Question

Resolva

a)a+3=a/3

b)a²+2ab+b²=(a+b).(a+b)-3-c

c)a-3=b/b + c/c - 50j/50j​

Answer 1

Explicação passo-a-passo:

$\\ a + 3 = \frac{a}{3} \\ 3(a + 3) = a \\ \\ 3a + 9 = a \\ 2a = - 9 \\ a = - \frac{ 9}{2} \\ \\ (a + b)(a + b) = {a}^{2} + 2ab + {b}^{2} \\ logo \\ {a}^{2} + 2ab + {b}^{2} = (a + b)(a + b) - 3 - c \\ \frac{ \: {a}^{2} + 2ab + {b}^{2} }{(a + b)(a + b)} = - 3 - c \\ 1 = - 3 - c \\ - c = 1 + 3 \\ - c = 4 \\ c = - 4 \\ \\ a - 3 = \frac{b}{b} + \frac{c}{c} - \frac{50j}{50j} \\ a - 3 = 1 + 1 - 1 \\ a - 3 = 1 \\ a = 1 + 3 \\ a = 4$