Q. 1 B4.2( 17 Votes )

# Use suitable identities to find the following products(x - 5) (x - 5)

(x - 5) (x - 5) = (x – 5)2

Using identity (a – b)2 = a2 – 2ab + b2

Here a = x and b = 5

(x - 5) (x - 5) = x2 – 2 × x × 5 + 52

(x - 5) (x - 5) = x2 – 10x + 25

Therefore (x - 5) (x - 5) = x2 – 10x + 25

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