Question

= (2x + y + 3z) (4x2 + y2 +92 - 2xy
EXERCISE 2.5
Use suitable identities to find the following products:
(i) (x+4)(x+10)
(ii) (x+8) (x-10)
3
3
2
(iv) (y + 3) (
(v) (3 - 2x) (3 + 2x)
Evaluate the following products without multiplying di
(i) 103 x 107
ii) 95 x 96
Factorise the following using​

Answer 1

Answer:

expressions:

(i) 5xyz2 – 3zy

(ii) 1 + x + x2

(iii) 4x2y2 – 4x2y2z2 + z2

(iv) 3 – pq + qr – rp

(v)

(vi) 0.3 a – 0.6 ab + 0.5 b

Sol. (i) 5xyz2 – 3zy

In the expression 5xyz2 – 3zy, the terms are 5xyz2 and –3zy.

coefficient of xyz2 in the term 5xyz2 is 5.

coefficient of zy in the term –3zy is –3.

(ii) 1 + x + x2

In the expression 1 + x + x2, the terms are 1, x and x2.