Use the remainder theorem:- f(x) = x3+nx2+3x-5 f(x) becomes f(2) because the divisor is x-2 and 2-2 = 0 f(2) = 8+4n+6-5 = -3 f(2) = 4n+9 = -3 f(2) = 4n = -12 f(2) = n = -3 So the value of n in the expression is -3 Check: f(2) = 8+(4*-3)+6-5 = -3
Since there is no expression given, there is no sensible answer.
4
When x = 2, 4x3 = 32
5
9
It would help if the expression was given!
7
4x^2 + 9 is a prime algebraic expression. Its numerical value may be prime of not - depending on the value of x.For x = 1, the value of the expression is 13 - a prime whereasfor x = 2, the value of the expression is 25 - not a prime.
As an algebraic expression it is simply: 18-x
n is a variable (representation of the number you are trying to find. 4n means 4 x n. EXAMPLE: If n = 2, then 4n = 4 x 2 = 8
When x = 2, 3x + 5 = 11.