Question

find the product of (1.3x+1.9y)(1.3x-1.9y)​

Answer 1

Answer:

1.3x+1.9y×1.3x-1.9y

so when we multiply 1.3x and 1.3x

so answer will be 1.69x²

then -++=-

3.61y²

answer wil be 1.69x²-3.61y²