Question

10 Factorise the following expression using
suitable identity or method
a) 24x² y ² + 36 xy² + 48x^2 y²
b) 25y^2-20y+4-81x^2
(^2 means sq)​

Answer 1

Step-by-step explanation:

a. 24x^2y^2+36xy^2+48x^2y^2

72x^2y^2+36xy^2

36xy^2 (2x+1)

b. 25y^2-20y+4

(5y)^2 - 2×5y×2 +(2)^2

Using identity a^2 - 2ab + b^2=(a-b)^2

(5y-2)^2

Answer 2

Answer: a. 24x^2y^2+36xy^2+48x^2y^2

72x^2y^2+36xy^2

36xy^2 (2x+1)

b. 25y^2-20y+4

(5y)^2 - 2×5y×2 +(2)^2

Using identity a^2 - 2ab + b^2=(a-b)^2

(5y-2)^2

hope this helps you