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But667
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Questions 39
Réponses 180

 #1
avatar+667 
+1

Does this problem let usage of a calculator? Because I used a calculator to discover that the factors of 1441 are 131 and 11.

 

*To check if a number is prime

 

So knowing that 131 and 11 multiply to 1441, we can see that miraculously if you substitute 1 for n in your equation 60+ k * 71n you get 131*k. And since 11 multiplied by 131 is 1441, k should be \(\boxed{11}\).

18 juil. 2019
 #1
avatar+667 
+2

What I would do is use the quadratic formula.

 

Then add the squares of the roots. You would get a real number.

 

Here is practice for complex solutions to quadratics if you are having trouble on these types

15 juil. 2019