Complete the square of the function y = 3x2 − 18x − 19. part a: where is the vertex located and what is the maximum or minimum value? what is the equation of the axis of symmetry? part b: what are the zeros of the function (as exact values expressed in radical form) and the y-intercept?

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.