HELP PLEASE Darlene wrote this proof of the identity (x + y)^2 - (x - y)^2 = 4 xy. Which of the
following is a justification for Step 5 of her proof?

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree

The product of (7x-2) and (20-3x)/4. when x=4

Aci is desired for the true average stray-load loss μ (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. assume that stray-load loss is normally distributed with σ = 2.3. (round your answers to two decimal places.)