Question

(x+8) (x-5)
find the product by using a suitable identity ​

Answer 1

Answer:

${x}^{2} + 3x - 40$

Step-by-step explanation:

(x+8)(x-5)

=> x^2+(8-5)x-5×8

$= > {x}^{2} + 3x - 40$

Hope it helps.....

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Answer 2

Answer:

x^2+3x-40

Step-by-step explanation:

(x+8)(x-5)

According to the identity

(x+a)(x-b)=x^2+(a-b)x-ab

where a=8 ,b=5

We get,

x^2+(8-5)x-8×5

=x^2+3x-40(ANS)