That’s easy it’s 18 because the 9x9=18 and there’s a 10s digit
12(4j+3)
because both are divisible by 12
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)
Answer: 60
30
Step-by-step explanation: that’s the first two, good luck!
