Q. 23.6( 7 Votes )

# Find the product

Answer :

(i) (2x + y) (2x + y)

2x (2x + y) + y (2x + y)

= 4x2 + 2xy + 2xy + 3y

= 4x2 + 4xy + 3y

(ii) (a + 2b) (a – 2b)

a (a – 2b) + 2b (a – 2b)

= a2 – 2ab + 2ab – 4b2

= a2 – 4b2

(iii) a2 (a2 – bc) + bc (a2 – bc)

= a4 – a2bc + bca2 – b2c2

= a4 – b2c2

(iv)  ( + ) - ( + )

= x2 + yx -  = x2 - y2

(v) 2x (2x - ) + (2x - )

= 4x2 - + - = 4x2 (vi) 2a3 (2a3 – b3) + b3 (2a3 – b3)

= 4a6 – 2a3b3 + 2a3b3 – b6

= 4a6 – b6

(vii) x4 (x4 - ) + (x4 - )

= x8 – 2x2 + 2x2 - = (x8 - )

(viii) x3 (x3 - ) + (x3 - )

= x6 – 1 + 1 - = x6 - Rate this question :

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