(x²+ 2x + 4) factorize
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x^2+2x+4
using identity (x+y)^2=x^2+2xy+y^2
x^2 = (x)^2
4 = (2)^2
then.....
2x = 2(x) (2)....
observing the identity......
(x+y)^2=x^2+2xy+y^2
(x+2)^2=x^2+2(x)(2)+2^2
hope you like it...
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