quadratic

(1) If c,d are the roots of the equation x²+ax+b=0 and a,b are the roots of the equation x²+cx+d=0 then find the value of a+2b+3c+4d =

4 Answers

Looks like there is some problem in the question..pls edit it..

1708

man111 singh ·2010-03-08 07:04:35

now i have edit..........

is the answer -8?

justw rite the relation between the roots and u ahve got 4 equations in 4 unknowns. try and solve them

kindly check if my answer is correct or not

341

Hari Shankar ·2010-03-09 07:31:13

a+b=-c; c+d = -a \Rightarrow b=d

Further ab=d; cd=b

b=d=0 \Rightarrow a=-c which gives infinitely many values for the expression.

Otherwise a=b=1 and c=d=-2 and the expression evaluates to -5

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