Разложите на множители (5x+y)^2-(x-5y)^2

(5x+y)^2-(x-5y)^2= =(5x+y-(x-5y))*(5x+y+x-5y)= =(5x+y-x+5y)*(6x-4y)= =(4x+6y)*2(3x-2y)= =2(2x+3y)*2(3x-2y)= =4(2x+3y)*(3x-2y)