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Best answer by Werner_E

 

B.png

 

Furthermore you have to consider that x^2 = 36 has two solution! Not only x=6 but also x=-6.

So you will get four solution pairs.

But as you have squared (which is no equivalence transformation) you may get "solutions" which aren't solution to the original problem and you have to filter out those wrong solutions and only the one pair which Prime came up with from the beginning should be left. As you limit your manual calculation to just three decimals I won't expect too much precision - probably no more than one decimal.

 

1 reply

24-Ruby IV
February 16, 2019

solve-float.png

24-Ruby IV
February 16, 2019

With the Solve block

solve-float-1.png

7-Bedrock
February 16, 2019
this same exercise solved in the hand presents different values, see:Equação1.jpgEquação2.jpg