9-2(-3)+6= 9+6+6 Your answer should be 21 if I read your question correctly
The general rule for difference of two squares is that when factorised it can be written in the form (a+b)(a-b) where a is the square root of the first part of the function and b is the square root of the second part of the function.
From this we can find the square root of x² to find a and the square root of 16y² to find b.
In this case √x²=x and √16y²=4y
Therefore fully factorised it can be written as (x+4y)(x-4y)
(m-21) (m+1)there I thinks it's right unless I messed up my work
Answer:
you can get flash cards and work with him everyday that's how I got mine
