Question

if D is the discriminant of the equation x²+2x-4 then 2D is​

Answer 1

Given:

An equation is given to us which is   $x^2+2x-4=0$.

To Find:

The value of discriminant of the equation ?

Step-by-step explanation:

• We have the equation of the form

                $x^2+2x-4=0$

• We will comapre the given equation with $ax^2+bx+c=0$

• On comapring we get a=1,b=2,c=-4

• We know discriminant of equation is given by

           [tex]D=b^2-4ac\\ put, a=1, b=2, c=-4\\\\ D=(2)^2-4\times1\times -4\\\\ D=4+16\\\\ D=18\\\\ 2D=36[/tex]

Thus discriminant is given by D=18, Then 2D=36

Answer 2

Answer:

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