Q85Multiple choice
Expand the following, using suitable identities.
- (i)(xy + yz)2
- (ii)(x2y – xy2)2 4 5
- (iii)a + b 5 4 2 3
- (iv)x – y 3 2 4 5 (v) p + q 5 3 (vi) (x + 3) (x + 7) (vii) (2x + 9) (2x – 7) 4 x y 4 x 3y (viii) + + 5 4 5 4 2x 2 2x 2a (ix) – + 3 3 3 3 (x) (2x – 5y) (2x – 5y) 2a b 2a b (xi) + − 3 3 3 3 (xii) (x2 + y2) (x2 – y2) (xiii) (a2 + b2)2 (xiv) (7x + 5)2 (xv) (0.9p – 0.5q)2 (xvi) x2y2 = (xy)2
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(i) (xy + yz)2
(ii) (x2y – xy2)2 4 5
(iii) a + b 5 4 2 3
(iv) x – y 3 2 4 5 (v) p + q 5 3 (vi) (x + 3) (x + 7) (vii) (2x + 9) (2x – 7) 4 x y 4 x 3y (viii) + + 5 4 5 4 2x 2 2x 2a (ix) – + 3 3 3 3 (x) (2x – 5y) (2x – 5y) 2a b 2a b (xi) + − 3 3 3 3 (xii) (x2 + y2) (x2 – y2) (xiii) (a2 + b2)2 (xiv) (7x + 5)2 (xv) (0.9p – 0.5q)2 (xvi) x2y2 = (xy)2