Question

the zero value of x2 + 3 x + 5​

Answer 1

Explanation:

This equation does not easily factorise so using the general equation

y

=

a

x

2

+

b

x

+

c

and the formula

x = − b + √b

2

−

4

a

c

2

a

or

x

=

−

b

−

√

b

2

−

4

a

c

2

a

then if

y

=

x

2

+

3

x

−

5

a =1, b = 3 and c = -5

x

=

−

3

+

√

3

2

−

(

−

20

)

2

or

x

=

−

3

−

√

3

2

−

(

−

20

)

2

Answer 2

Answer:

x=(-3±i√11)/2

Step-by-step explanation:

x²+3x+5

x=(-b±$\sqrt{b^{2} -4ac}$)/2a

x=(-3±$\sqrt{9-20}$)/2

x=(-3±i√11)/2