Q89Multiple choice
Factorise the following, using the identity a2 + 2ab ab + b 2 = (a a + b )2
- (i)x2 + 6x + 9
- (ii)x2 + 12x + 36
- (iii)x2 + 14x + 49
- (iv)x2 + 2x + 1 (v) 4x2 + 4x + 1 (vi) a2x2 + 2ax + 1 (vii) a2x2 + 2abx + b2 (viii) a2x2 + 2abxy + b2y2 (ix) 4x2 + 12x + 9 (x) 16x2 + 40x +25 (xi) 9x2 + 24x + 16 (xii) 9x2 + 30x + 25 (xiii) 2x3 + 24x2 + 72x (xiv) a2x3 + 2abx2 + b2x 4 3 2 x2 (xv) 4x + 12x + 9x (xvi) + 2x + 4 y2 (xvii) 9x2 + 2xy + ab + b 2 = (a
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(i) x2 + 6x + 9
(ii) x2 + 12x + 36
(iii) x2 + 14x + 49
(iv) x2 + 2x + 1 (v) 4x2 + 4x + 1 (vi) a2x2 + 2ax + 1 (vii) a2x2 + 2abx + b2 (viii) a2x2 + 2abxy + b2y2 (ix) 4x2 + 12x + 9 (x) 16x2 + 40x +25 (xi) 9x2 + 24x + 16 (xii) 9x2 + 30x + 25 (xiii) 2x3 + 24x2 + 72x (xiv) a2x3 + 2abx2 + b2x 4 3 2 x2 (xv) 4x + 12x + 9x (xvi) + 2x + 4 y2 (xvii) 9x2 + 2xy + ab + b 2 = (a