help plz! Describe and correct the error a student made when solving for x. Describe the error the student made. Choose the correct answer below. A. The student cannot divide both sides by k in the fourth line without knowing that k is not equal to 0. B. The equation was not solved for x because x appears on both sides of the equation. C. The solution is not complete until the student subtracts 3 from 4 in the last line. D. The equation was not solved for x because k is still in the equation.

The student cannot divide both sides by k in the fourth line without knowing that k is not equal to 0. B. The equation was not solved for x because x appears on both sides of the equation. C.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.