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704 × 696 solved by square formula
=（700+4）*（700-4）
=700^2 -4^2
=490000-16
=489984
It is known that f (x) is an even function defined on real number r, and is a decreasing function at (0, + infinity). Compare the size of F (- 3 / 4) with F (a ^ 2-A + 1)
Even function
So f (- 3 / 4) = f (3 / 4)
A^2-A+1=(A-1/2)^2+3/4>=3/4
10> 0 is a decreasing function
3/4=F(A^2-A+1)
So f (- 3 / 4) > = f (a ^ 2-A + 1)
Let a = LG2 and B = Lg3. Let a and B denote 108 under LG root
Urgent. Urgent
That's 108 under the root. Right?
LG radical 108 = (1 / 2) * lg108
Lg108 = LG (the square of 2) * (the third power of 3)
=(2lg2)+(3lg3)=2a+3b
LG radical 108 = a + 3 / 2B
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