find value of k such that4x6-24x5+20x4+68x3-44x2-40x+kplzz xplain!!!

askIITians Faculty 396 Points
14 years ago

Dear ajinkya,

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

THE FINAL EXPANSION OF THIS equation is :

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.

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