If `x in N` and `|[x+3,-2],[-3x,2x]|=8,` then find the value of `x`

If the mean of 2,3, x ,7 ,8 is x, then find the value of x .

If x=5, find the value of : 3x^(2)-8x-10

If x= 3+i , then find the value of x^(3)-3x^(2)-8x+15

If x - 2/x = 5 , find the value of x^3 - 8/x^3

a) If |x-2|=3 , then what is x ? b) If |x-2|=|x-8| , then what is |x-2|+ |x-8| ? c) If |x-2|+|x-8|=6 , then find the integer values of x?

If [2x , 3][{:(1,2),(-3,0):}],[{:(x),(8):}]=O then find the value of x .

If (x^(2)-4) is a factor of (mx^(3)-x^(2)-2x+n) ,then find the value of (2m+n)