Question

Кто решит дам 40 балов!

x^2 - 29x - 42 = 0

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Answer 1

$\displaystyle\\x^{2} -29x-42=0\\D=b^{2} -4ac=(-29)^{2} -4*1*(-42)=841+168=1009\\x_{1} =\frac{-b+\sqrt{D} }{2a}=\frac{29+\sqrt{1009} }{2}\\x_{2} =\frac{-b-\sqrt{D} }{2a}=\frac{29-\sqrt{1009} }{2}$