2) Find the value of `(-5^2)`

Find the value of the 5^(2)

If (2+sqrt(5))/(2-sqrt(5)) =x and (2-sqrt(5))/(2+sqrt(5)) =y , find the value of x^(2)-y^(2) .

Find the value of : -5-(-3)+2

If x=5, find the value of : 6-7x^(2)

Find the value of the (-(2)/(5))^(3)

Find the value of : ((18.5)^(2) - (6.5)^(2))/(18.5 + 6.5)

If 5x=sectheta and 5/x=tantheta , find the value of 5(x^2-1/(x^2)) .

Find the value of (x+5)/(2) where x = total structural isomers with molecular formula C_(6)H_(12) containing cyclo propane ring.

Find the value of the (-2)^(3)xx5^(2)

5 2/ 3 -x 5/6 = 2 . Find the value of x .