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Remove all perfect squares from inside the square root 25x^4

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the answer:

the main rule:
for all value positive of a real b, √b²= b, and √b*c= √b * √c, if c is a real positive

let A=√25x^4, we know that 25x^4=5² * x² * x²
therefore,
√25x^4= √5² * x² * x² =√5² √x² √x² = 5* x*x= 5x²

the final answer is A=√25x^4=5x²
User Chrickso
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