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The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

Rounded to the nearest tenth, what is the value of x