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(1) (2 - x)(2 + x)(4 + x^2)
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Answer:
[(2-x)(2+x)](4+x²)
let ,
2= a,, x=b
= [(a-b)(a+b)](4+x²)
=(a²-b²)(4+x²)
=a²(4+x²) -b(4+x²)
=4a²+a²x²-4b -bx²
let us write the values of a and b in their places!
=4(2)²+(2)²x²-4(x)-(x)x²
=8+4x²-4x-x³
=-x³+4x²-4x+8
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