Question

4(x-y) square-12(x-y)+9​

Answer 1

Answer:

4x²+8xy+4y²-12x-12y+9

Step-by-step explanation:

4(x-y)²-12(x+y)+9

we need to square a binomial

the following formulae should be applied

(a+b)²=a²+2ab+b²

In our example

a=x,b=y

therefore, 4(x²+2xy+y²)-12(x+y)+9

4x²+8xy+4y²-12x-12y+9