The expression which will result in difference of two squares is:
Β (β7x + 4)Β·(β7x β 4)
Step-by-step explanation:
We know that the formula of the type:
(a-b)(a+b)=aΒ²-bΒ²
i.e. it is a difference of two square quantities. (a^2 and b^2)
since,
a= -7x , b=4
(-7x+4)(-7x-4)= (-7x)Β² - (4)Β²
=(7x)Β² - 4Β²
So the expression is a difference of two square quantities:
(7x)Β² and (4)Β²
Hence the answer is (β7x + 4)Β·(β7x β 4)