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

1.

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

Answer»

Hi...

Here is your answer...

We know that the identity

(x + a) (x + b) = X2 + (a + b)x + ab

Now

(X + 8) (x - 10)

[ Here a = 8 and b = -10 ]

(X + 8) (x - 10) = x2 + (8 - 10)x + 8X(-10)

= x2 - 2x - 80

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