simplify (x+2) (x-2) (x ^2 +4)
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(X+2)(X-2)(X²+4)
According to Identity=a²-b²=(a+b)(a-b)
Here A=X
B=Y
First 2 terms can written as (x²-2²)
Now Third Term=(x²+4)
=(x²+2²)
Now If they Written
(x²-2²)(x²+2²)
Now Again With Identity
Here A=x²
B=2²
It can be Written as
[(x²)²-(2²)²]
=(x⁴-2⁴)
According to Identity=a²-b²=(a+b)(a-b)
Here A=X
B=Y
First 2 terms can written as (x²-2²)
Now Third Term=(x²+4)
=(x²+2²)
Now If they Written
(x²-2²)(x²+2²)
Now Again With Identity
Here A=x²
B=2²
It can be Written as
[(x²)²-(2²)²]
=(x⁴-2⁴)
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