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If a and b are the roots of x^2 + x - 3, then find 4b^2 - a^3.

 Aug 13, 2021
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If a and b are the roots of x^2 + x - 3, then find 4b^2 - a^3.

 

Hello Guest!

 

\(x^2 + x - 3=0\\ x=-0.5\pm \sqrt{0.25+3}\\ x=-0.5\pm 0.5\sqrt{13}\)

\(a=-0.5+0,5\sqrt{13}\\ b=-0.5-0.5\sqrt{13}\)

 

\(\large4b^2 - a^3=19\)

laugh  !

 Aug 13, 2021

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