Find the value of x. ` x^3-9x^2+23x-15 =0`

If x=1/2(5-3i) , then find the value of x^4-x^3-12x^2+23x+12

If x=(1)/(2)(5-3i), then find the value of x^(4)-x^(3)-12x^(2)+23x+12

Find the value of x and y from 7x-15y-2=0 x+2y-3=0

Find the value of x and y from 7x-15y-2=0 x+2y-3=0

Find the values of x such that f(x)=2x^(3)-9x^(2)+12x+2 is a decreasing function.

If x^(2) + (1)/(x^(2)) = 23 , then find the value of x + (1)/( x) and x^(3) + (1)/( x^(3))

If x= -5 + sqrt(-16) , find the value of x^(4) + 9x^(3) + 35x^(2)-x + 4

If 7x - 15y = 4x + y , find the value of x: y . Hence, use componendo and dividendo to find the values of : (i) (9x + 5y)/(9x - 5y) (iI) (3x^(2) + 2y^(2))/(3x^(2) - 2y^(2))

Find the value of : 3x^(2)+9x^(2)-x+8 where x=-2

Maximum value of f(x)=x^(3)-9x^(2)+24x-15 is