The simplified expression is 
and the restriction is 
<h3>How to simplify the expression?</h3>
The expression is given as:
Express x^2 - y^2 as (x + y)(x - y) and factorize other expressions
Rewrite the expression as products
Cancel out the common factors
Express 4x^2 - y^2 as (2x - y)(2x + y)
Cancel out the common factors
Take the LCM
Hence, the simplified expression is and the restriction is
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One number is 4
Another is 2 I hope this helped
he divided each rectangle in 12 identical parts
for the first rectangle he shaded 1/3 of 12 = 4 parts
for the second rectangle he shaded 1/4 of 12= 3 parts
so 12= 3*4 leads to a minimum of 12 parts
:)
No idea sorry! If I knew I would tell you
