Find all real values of x that satisfy the equation (x^2 - 82)^2 = 25.
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(x2−82)2=25x2=a(a−82)2−25=0
(a−82+5)(a−82−5)=0a1−82+5=0a1=77, x1,2=±√77a2−82−5=0a2=87, x3,4=±√87
x∈{−√87, −√77, +√77, +√87}
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