Question

If there are two distinct zeros, enter them separated by a comma. If there is a single zero, enter it. If there

are no zeros, enter the word none.
Find the zeros of the quadratic function from its graph.
y = x2 + 9x + 20
1 2
الفا
4
G
-10
-9
-8
-6
5
-2
- 1
0
1

Answer 1

Given that,

An equation :
`y=x^2+9x+20`

To find,

The zeros of the above function.

Solution,

To find zero, put y = 0

`x^2+9x+20=0\\\\x^2+5x+4x+20=0\\\\x(x+5)+4(x+5)=0\\\\(x+4)=0\ \text{and}(x+5)=0\\\\x=-4\ \text{and}\ x=-5`

So, the zeros of the above quadratic equation is -4 and -5.