If (x + k) is a factor of f(x), which of the following must be true? f(k) = 0 f(–k) = 0 a root of f(x) is x = k. a y intercept of f(x) is x = –k.

The Factor Theorem us that if is a factor of , then .

This means that substituting into the function will leave NO remainder and thus the value would be 0.

From the definition, we clearly see that if is a factor of , then plugging in into will give us a value of 0, or in other words, .

Second option is correct.

ANSWER: must be true.

positive

step-by-step explanation:

the quadrant is facing upwards

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.