Question

if one of the roots of the equation 2x2+px+9=0 is twice the other root. find the possible value of p

Answer 1

p=-9 and roots are 1.5 and 3

Answer 2

can u show me the method?

Answer 3

method- the way u do it~

Answer 4

let on root be y, so the other one is 2y.
so (x-2y)(x-y)=0
x^2-3xy+y^2=0
is we multiply the eqn by 2
2x^2-6xy+2y^2=0
Now equate the coefficients.. u will get the answers.

Answer 5

owh..ok :D tq so much~

Answer 6

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