Question

find the product using suitable identity.​

Answer 1

Answer:

$= > x {}^{2} + 9x + 20$

Step-by-step explanation:

$= > (x + 5)(x + 4) \\ = > x { }^{2} + 4x + 5x + 20 \\ = > x {}^{2} + 9x + 20$

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Answer 2

Answer:

We have

( x+5)(x+4)

Bye the rule of multiplication

= x^2 +4x+5x+20

= x^2 +9x+20

This is the required solution.

And its zeros are

- 5,-4