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Given y=x2 + 9x + 20 find the zeroes.
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Given y=x2 + 9x + 20 find the zeroes.

User Felix Lemke
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1 Answer

5 votes

Answer:

x=-5 x=-4

Explanation:

y=x^2 + 9x + 20

We need to factor the equation

What 2 numbers multiply to 20 and add to 9

4*5 = 20

4+5 =9

y=(x+5) (x+4)

To find the zero's we set the equation equal to zero

0= (x+5) (x+4)

Using the zero product property

x+5 = 0 x+4=0

x=-5 x=-4

User Chanzerre
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