(a^2+ab-ac-bc)^2/(a^2+2ab+b^2)(a^2-2ac+c^2)*4 Упростите авражение

Question

(a^2+ab-ac-bc)^2/(a^2+2ab+b^2)(a^2-2ac+c^2)*4 Упростите авражение

Answer 1

(a^2+ab-ac-bc)^2/(a^2+2ab+b^2)(a^2-2ac+c^2)*4 =((a-c)(a+b))^2/(a+b)^2(a-c)^2*4=1/4=0.25