



 
Hi Pori, In many cases English is not as precise as mathematics. I'm not sure if you want the number which is the square of minus 5 or the number which is minus the square of 5. The first would be $(5)^2 = (5) \times (5) = 25.$ The latter would be $ 5^2 =  25.$ It is a convention in mathematics that exponentiation (powers), multiplication and division are performed before addition and subtraction and hence with $5^2$ I perform $5^2 = 25$ before applying the negation. I hope this helps, 



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