Determine o valor das expressões algébricas:
a) 2x²+4x-5, com x=3
b) √a+b
________ com a=64 e b= 36
√a+√b
a) 2x²+4x-5, com x=3
b) √a+b
________ com a=64 e b= 36
√a+√b
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A) 2.(3)^2+4.(3)-5
2.9+12-5
18+7=
25
B)
10/8+6
10/14
simplifica 2
5/7