Question

1. Find the product by using a suitable identity.
(i) (x + 5) (x + 4)
(ii)
(a + 3) (a + 6)
(iv) (X + 8) (x - 5)
(v)
(z - 3) (z - 1)
(vii) (y - 1) (y + 2)
(viii)
(z + 3) (z - 7)
(x) (z + 6) (2-5)
(xi)
(x - 6) (x -9)
(xiii) (y - 4) (y + 4)
(xiv)
(x - 4) (x - 14)​

Answer 1

Answer:

(i) x2 + 11x 30

(ii) x2 + 17x + 70

(iii) x2 + 17x + 72

(iv) x2 + 11x + 24

2. (i) x2 – 4x – 21

(ii) x2 + 3x – 10

(iii) t2 + 2t – 35

(iv) t2 + 5t – 36

3. (i) a2 – 5a + 6

(ii) a2 – 16a + 55

(iii) a2 – 5a + 4

4. (i) m2 + 14m – 95

(ii) m2 + 7m – 78

(iii) m2 + 4m – 12

(iv) m2 – 3m – 4

5. (i) x2 + 17/4 x + 1

(ii) x2 + 67/9 x + 28/9

(iii) y2 – 25/12 y + 1

(iv) y4 – 13y2 + 36

(v) z4 + 26/3 z2 – 3

(vi) z4 – z2 – 6

(vii) p4 – 20/9 p2 – 32/27

(viii) 9a4 + 3a2b2 – 20b4

6. (i) 10710

(ii) 41412

(iii) 9312

(v) 7209

(v) 9991

(vi) 40385

(vii) 89072

(viii) 3647

Answer 2

Answer:

i. l( x + 5)( x + 4)

soln

×+× x 5-4

2× x 1

× = ½