December 2019 1 362 Report
O valor numérico da expressão 2raiz xy -raiz x2-21y ,para x=12 e y =3 , é igual a:
a)0.
b)3.
c)9.
d)-3.
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A) 2x+4= 3x-2 2 3 b) 3x -2 = 2x+3 5 2 c) 1/7 (1-x) -1/3 d) 9 (x-5) = 10 (x+2x-4) e) -2(-x-8) = -3 (-x-9) f) 1/4 (4-x) 2/5 (4-2x)
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