Question

Find the roots of quadratic equation 2x^2-√5x-2 using the quadratic formula?

Answer 1

we know, if ax² + bx + c = 0 is a quadratic equation.

then, roots of quadratic equation is given by using formula, $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

here, 2x² - √5x - 2 is a quadratic equation.

compare it with ax² + bx + c = 0

then, a = 2 , b = -√5 and c = -2

so, roots of quadratic equation , x = $\frac{-(-\sqrt{5})\pm\sqrt{(-\sqrt{5})^2-4.2(-2)}}{2.2}$

x = $\frac{\sqrt{5}\pm\sqrt{21}}{4}$

hence, roots of quadratic equation 2x^2-√5x-2 is (√5 + √21)/4 and (√5 - √21)/4

Answer 2

Answer:

Plz Plz Plz is a triangle in which one