Question 9 of 10 Select the two values of x that are roots of this equation. x + 3X-6=0 A. x = -3-15 2 B. X= -3+55 2 13 C. X= -3-133 2. O D. -3+√15 2

Question 9 of 10 Select the two values of x that are roots of this equation x 3X60 A x 315 2 B X 355 2 13 C X 3133 2 O D 315 2 class=

Respuesta :

Given:

[tex]x^2+3x-6=0[/tex]

This is of the form

[tex]ax^2+bx+c=0[/tex]

where a=1, b=3 and c=-6.

Using the quadratic formuls.

[tex]x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}[/tex]

Substitute a=1, b=3, and c=-6 in the formula, we get

[tex]x=\frac{-3\pm\sqrt[]{3^2-4(1)(-6)}}{2(1)}[/tex]

[tex]x=\frac{-3\pm\sqrt[]{9+24}}{2}[/tex]

[tex]x=\frac{-3\pm\sqrt[]{33}}{2}[/tex]

Hence the roots of the given equation are

[tex]x=\frac{-3+\sqrt[]{33}}{2},x=\frac{-3-\sqrt[]{33}}{2}[/tex]

Options B and C are correct.