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## Using suitable identities find the product of (a) (2x + 3y/4)^2 (b) (4x^2 + 5y^2) (4x^2 – 5y^2)

(a) (2x + 3y/4)2 (b) (4×2 + 5y2) (4×2 – 5y2) (c) (x + 2/5) (x – 2/5) (d) (xy – 2z)2 (e) (a + bc) (a – bc) (a2 + b2c2) (f) (2a/3b – 3b/2a)2 (g) (- 3a – 4b)2 (h) (a – 7) (a + 7)

## Evaluate using identity (a) (503)^2 (b) (8.7)^2 – (1.3)^2

## Multiply (8y^3 + 7y^2 + 3y) by (3y – 4)

## From the sum of 14a + 9b – 8c and 12b + 13c – 15a subtract the sum of 8a – 17b + 4c and 11a – 16b + 17c.

## Divide (a) 48x^3y^3z^3 by 4x^2y^2z^2 (b) – 81a^4b^5c^7 by a^3b^2c^2

(a) 48x3y3z3 by 4x2y2z2 (b) – 81a4b5c7 by a3b2c2 (c) 72a3b3c3 by 24a2bc2 (d) 28x2y2x2 by – 4xyz2 (e) 55a8b8 by 11a5b5 (f) 24a3b3 – 18a2b2 + 12ab by – 6ab (g) 42a2b2 – 84a3b3 – 56a4b4 by – 14a2b2 (h) 16x3y – 12x2y2 – 20xy3 by – 4xy