Someone please solve this

12

Step-by-step explanation:

f(x) = x^2 - x^3

    Let x=-2

f(-2) = (-2)^2  - (-2)^3

      = 4 - (-8)

      = 4+8

    = 12

f(-2)=12

Step-by-step explanation:

We are given:

f(x)=x^2 - x^3

We are told to find f(-2). We need to find f(x) when x is equal to -2. Therefore, we can substitute -2 in for each x.

f(-2)= (-2)^2 - (-2)^3

Evaluate the exponent -2^2 .

-2^2= -2 * -2= 4

f(-2)= 4- (-2)^3

Evaluate the exponent -2^3

-2^3= -2* -2*-2= -8

f(-2)= 4- -8

f(-2)= 4+8

f(-2) =12

f(-2) is equal to 12, therefore D is correct.

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.