que.13 solve fast... urgent
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i hope it will help you
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Given eqn
X sq -2x-15=0
Ie alpha + beta = -b/a
= 2
alpha.beta= c/a= -15
Now quad eqn of roots 2alpha and 2beta
Xsq-(2alpha+2beta)x+2alpha.2beta=0
Xsq - 2(2)x+4(-15)=0
Xsq -4x -60=0
ans
Hope it helps
X sq -2x-15=0
Ie alpha + beta = -b/a
= 2
alpha.beta= c/a= -15
Now quad eqn of roots 2alpha and 2beta
Xsq-(2alpha+2beta)x+2alpha.2beta=0
Xsq - 2(2)x+4(-15)=0
Xsq -4x -60=0
ans
Hope it helps
Harshjain111:
thnxx dear
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