24. Prove that if ax3 + bx2 + cx + ...
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24. Prove that if ax3 + bx2 + cx + d = 0 has three real and distinct roots, then b2 > 3ac.

JEE/Engineering Exams
Maths
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( a x^{3}+6 x^{2}+c x+a ) ( f^{prime}(x)=39 x^{2}+26 x+c+f^{2}+6 x^{2}+1 ) [ 2>0 ] ( 46^{2}-4(3 9 1 longdiv { text { C) } } > 0 ) [ 6^{2}-39 c>0 ] ( left[b^{2}>3 a cright] ) He only forl can have nod nusts 4 牛 ( longrightarrow )
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