Prove that in general (x + a)
2 ≠ x2 + a2

yes they are not equal because (x + a) = 2x + 2a

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.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval