Question

Find the product : (x – 3y) (x + 3y) ( Factories a 2 +b 2 +2ab+2bc+2ac

Answer 1

Answer:

1). x^2-9y^2

2.(a+b)(a+b+2c)

Step-by-step explanation:

1). (x-3y)(x+3y)

= x^2-(3y)^2 ...using (a-b)(a+b)=a^2-b^2

=x^2-9y^2

2). a^2+b^2+ab+ab+2c(b+a) ...(write 2ab=ab+ab)

a^2+ab+b^2+ab+2c(a+b)

a(a+b)+b(a+b)+2c(a+b)

(a+b)(a+b+2c)