Q. 145.0( 4 Votes )

# Express the follo

Answer :

(i) We use (x + 2z)(2x + z) = (x + 2z)(2x + z) = (ii) 4(x + 2y)(2x + y) = (2x + 4y)(4x + 2y)

We use 4(x + 2y)(2x + y) = 4(x + 2y)(2x + y) = ( 3x + 3y)2-(2y – 2x)2

(iii) We use (x + 98)(x + 102) = (x + 98)(x + 102) = (x + 100)2-(x-100)2

(iv) 505 × 495 = (500 + 5)(500-5)

We use (a + b)(a - b) = a2 - b2

505 × 495 = 5002-52

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