[SOLVED] Quadratic expression

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• April 7th 2010, 10:29 AM
Noxide
[SOLVED] Quadratic expression
Given: (x^2 + 2ax + 1)^(1/2)

is it correct to say that x^2 + 2ax + 1 = (x + a)^2 (and make the assumption that a^2 = 1) such that

(x^2 + 2ax + 1)^(1/2) = |(x + a)| ?
• April 7th 2010, 10:32 AM
Amer
x^2 + 2ax + 1 = (x + a)^2

this is not correct for $a\ne 1$

$(x+a)^2 = x^2 +2ax +a^2$