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find value of k such that


plzz xplain!!!

6 years ago


Answers : (1)


Dear ajinkya,

Expand the equation: [ax3 + bx2 + cx + d]2---------------------eq. 1



Now compare this equation with the corresponding coefficients given equation you will get the following values:

a2 = 4; 2ab = -24; (b2-2ac)= 20; 2(ad+bc)= 68.

therefore you will get the following values:

a=2; b=-6; c= -4; d= 5.

clearly from both the equation its clear that value of k is d2; which is equal to 6. provides online iit jee courses and IIT JEE Test Series with IITians. Click here to get free online test series and check your status timely or you can join us as our registered user for getting best iit jee study material or iit jee test series.

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all the best.

thanks and regards.

Akhilesh Shukla

6 years ago

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