Question

find the value of discriminant for x2 +x - 20 =0​

Answer 1

Answer:

The solutions for the equation are: x=−4,x=5

Explanation:

x2−x−20=0

The equation is of the form ax2+bx+c=0 where:

a=1,b=−1,c=−20

The Discriminant is given by:

Δ=b2−4⋅a⋅c

=(−1)2−(4⋅1⋅(−20))

=1+80=81

The solutions are found using the formula:

x=−b±√Δ2⋅a

x=−(−1)±√812⋅1=1±92

x=1+92=102,x=5

x=1−92=−82,x=−4