## mathmath333 one year ago fun question

1. anonymous

?

2. mathmath333

solve for $$y,\ \ y\in \mathbb{R}$$ \large \color{black}{\begin{align} |y+k|=-4\hspace{.33em}\\~\\ \end{align}} where roots of $$2x^2-(5k+4)+7=0$$ are equal in magnitude and opposite in sign.

3. Elsa213

how is this fun? ;~;

4. ganeshie8

is there a "x" missing in the middle term of given quadratic equation ?

5. ganeshie8

$2x^2-(5k+4)\color{red}{x}+7=0$

6. mathmath333

let me see ,wait

7. mathmath333

yes u r right x was missing

8. mathmath333

solve for $$y,\ \ y\in \mathbb{R}$$ \large \color{black}{\begin{align} |y+k|=-4\hspace{.33em}\\~\\ \end{align}} where roots of $$2x^2-(5k+4)x+7=0$$ are equal in magnitude and opposite in sign.

9. ganeshie8

but how can absolute value be negative ?

10. mathmath333

:)

11. ganeshie8

oh trick question is it xD $y\in \emptyset$

12. alekos

that's exactly what i was wondering

13. mathmath333

initially u fell for the trap

14. anonymous

@ganeshie8 how old are you (exited to know)

15. ganeshie8

haha that negative symbol is too small to notice

16. mathmath333

haha small little question , no real solution

17. mathmath333

i hope every body understood the trick