Question

упростите выражения
(x-5)^2-25
(y-1)(y-2)-y^2

Answer 1

$(x - 5) {}^{2} - 25 \\ x {}^{2} - 10x + 25 - 25 \\ x {}^{2} - 10x \\ \\ 2)(y - 1)(y - 2) - y {}^{2} \\ y {}^{2} - 2y - y + 2 - y {}^{2} \\ - 3y + 2$