Question

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Answer 1

8+/-$\sqrt{64-4.3.(-3)$ / 2.3

8 +/- $\sqrt{100}$ / 6

8+/-10 / 6

x1=3

x2= -2/6=-1/3

Soma: 3-1/3= 9/3-1/3=8/3

Produto: 3. -1/3=-3/3=-1

letra d