Xsquare -3x-10=0 find the discriminent​

Answers (1)

The equation is \begin{array}{l} x^{2}-3 x-10 =0 \end{array}

 \begin{array}{l} a=1 \\ b=-3 \\ c=-10 \\ D=\sqrt{b^{2}-4 a c} \\ D=\sqrt{(-3)^{2}-4 * 1 *(-10)} \\ D=\sqrt{9+40} \\ D=\sqrt{49} \\ \text { Hence, } \mathrm{D}=\pm 7 \end{array}

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