[administration]

Q. Let c, d be the roots of the equation x^2 – 10a – 11d = 0. And a, b be the roots of the equation x^2 – 10c – 11b = 0. What is the value of a + b + c + d?

[Wonder Boy]

c+d=10a ; a+b=10c ;
hence , a+b+c+d=10(a+c)

cd=-11d=> c=-11 [since d =/= 0]
ab=-11b=> a=-11 [since b=/= 0]
hence a+b+c+d = 10 x -22 =-220

[Author]

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