Question

Factorise 25a^2-9b^2+12bc-4c^2

Answer 1

Answer:

=(5a+3b-2c)(5a-3b+2c)

Step-by-step explanation:

formula:

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

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

=25a^2-(9b^2-12bc +4c^2)

=25a^2- ((3b)^2-2.3b.2c+(2c)^2)

=25a^2-(3b-2c)^2

=(5a)^2-(3b-2c)^2

=(5a+(3b-2c))(5a-(3b-2c))

=(5a+3b-2c)(5a-3b+2c)

Answer 2

Answer:

this is ur answer.. hope this helps you