If x=2,y=5 and z=4 Find the value of: yx×z
If a−b=2 and ab=48, find the value of a2+b2.
If x=(−25)30÷(−25)28 and y=(−25)2×(−25)3, find the value of (x3÷y)2.
If x=(−25)30÷(−25)28 and y=(−25)2×(−25)3, then find the value of (x3÷y)2.