1 Answered Questions for the topic Factoring Square Roots

x=(√5−√7)^2, best approximation of x? Arithmetic

If x=(√5−√7)^2, what is the best approximation of x? WHY is the answer is 0?? I got 4 by doing this:   x= (√5−√7)*(√5−√7); my answer after foiling was: x= 5-2-√35 + 7 = x= 10-√35...... so how... more

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