4ddjhjha24 4ddjhjha24

14-01-2021
Mathematics

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Which expression is a factor of both x^2-9 and x^2+8x+15

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NagThiriKo NagThiriKo

14-01-2021

Step-by-step explanation:

x^2-9=0
x^2+8x+15=0

(x+5)(x+3)=0

x+5=0 or x+3=0

x=-5or x=-3

x=-5 in x^2-9=0

(-5)^2-9=0

10-9=0

1=0

x=-3 in x^2-9=0

(-3)^2-9=0

9-9=0

0=0

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