Question

simplify (2x-y+5)square-(2x+y+5)square​

Answer 1

Answer:

$8y {}^{2} - 10y$

Step-by-step explanation:

$(2x - y + 5) {}^{2} - (2x + y + 5) {}^{2} = \\ (2x - y + 5 + 2x + y + 5) \times \\ (2x - y + 5 - 2x - y - 5) = \\ (4x + 10)( - 2y) = \\ - 8y {}^{2} - 20y$