Find all values of a such that a x^2 + 3x + 5 = 0 has two real roots.

a < 9/20

Step-by-step explanation:

Our equation is the following: ax^2 + 3x + 5

a = unknown

b = 3

c = 5

We are concerned with the discriminant. Namely, b^2 - 4ac must be greater than 0 if we want to real roots

Lets plug in the values:

9 - 4a(5) > 0

9 - 20a > 0

9 > 20a

9/20 > a

a < 9/20

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)