Question

((p-x+c)(p+x-c) как решить

Answer 1

$(p-x+c)(p+x-c)=p^2-xp+cp+xp-x^2+cx-cp+cx-c^2= \\ p^2-x^2-c^2+2xc$

Answer 2

По формуле
a²-b²=(a-b)(a+b)

(p-x+c)(p+x-c)=(p-(x-c))(p+(x-c))=p²-(x-c)²=p²-(x²-2xc+c²)=p²-x²+2xc-c²