evaluate the expression for the given value of the variable 1/4x^2-5x+7,x=2/3 when x=2/3,1/4x^2-5x+7

Laoze,

The little hat means "to the power of" it is standard notation.

It is often called a 'hat' but its real name of the character is caret

I find this expression inelegant. Such is my evaluation of it. What does the little hat mean?

When x = 2/3 then (1/4)x^{2} - 5x + 7 becomes (1/4)(2/3)2 - 5*(2/3) + 7 → 1/9 - 10/3 + 7 → (1 - 30 + 63)/9 → 34/9 → 3 7/9

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