Question

Q8. Factorize the following:
a) 4x2 – 9
b) 15 p q + 15 + 9 q + 25 p
OR
Q8. Factorise the following:
a) x2 – 10x + 25
b) x2 + 14x + 49​

Answer 1

Step-by-step explanation:

8-9 = -1

For 5 points this is enough

Answer 2

Answer:

a) 4x^2 - (3)^2

using identity a^2 -b^2= (a+b)(a-b)

(4x-3)(4x+3)=0

x=3/4 , -3/4

b) 30pq +9q^2 +25p^2. (I think the question is wrong , it has to be like this)

using identity a^2 +b^2 +2ab= (a+b)^2

2×5p×3q + (3q)^2 + (5p)^2

(5p +3q)^2

OR

a) x^2 -10x+25 (splitting the middle term)

x^2 -5x -5x +25

x(x-5)-5(x-5)

(x-5)(x-5) or (x-5)^2

b)x^2 +14x+49

x^2 +7x+7x+49

x(x+7)+7(x+7)

(x+7)(x+7) or (x+7)^2

Hope it helps....