Question

how to solve(x+8) (x-10) using suitable identities find the following products
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Answer 1

Answer:

x² – 2x – 80

Step-by-step explanation:

(x + 8) (x – 10)

Using identity,

[(x + a) (x + b) = x² + (a + b) x + ab]

Here, a = 8 & b = –10

(x + 8) (x – 10)

= x²+{8+(– 10)}x +{8×(– 10)}

= x² + (8 – 10)x – 80

= x² – 2x – 80

Answer 2

Answer:

You have to use the following identity

( a + b) ( a - b) = a ² - b²

So now according to the problem -

The give equation is ( x+8) (x+10)

a= x

b= 8

Now -

x(x+10)  -  8(x+10)

x ²+ 10x  -  8x +80

x ² - 2x + 80

Therefore , x ²- 2x + 80 is the final answer

I hope it is correct