Sabendo que o valor da expressão (a+b)= 15 e(c-d)=40, calcule o valor numérico da expressão algébrica a ao quadrado - b ao quadrado / a-b + c ao quadrado - d ao quadrado/ 2c+2d

Abilliard ball is struck by a cue. it travels 1 0 0 cm 100cm before ricocheting off a rail and traveling another 1 2 0 cm 120cm into a corner pocket. the angle between the path as the ball approaches the rail and the path after it strikes the rail is 4 5 ∘ 45 ∘ . how far is the corner pocket from where the cue initially struck the ball? do not round during your calculations. round your final answer to the nearest centimeter.