Question

Спростiть вираз (5-2х)*(5+2х)-(3-2х)*(4-2х)

Answer 1

$(5-2x)*(5+2x)-(3-2x)*(4-2x)=(25-4x^2)-(12-6x-8x+4x^2)=\\=(25-4x^2)-(12-14x+4x^2)=25-4x^2-12+14x-4x^2=\\=13-4x^2+14x-4x^2=13-8x^2+14x=-8x^2+14x+13$

Answer 2

Ответ:

Объяснение:

(5-2х)*(5+2х)-(3-2х)*(4-2х)=5²-(2х)²-(12-6х-8х+4х²)=25-4х²-12+6х+8х-4х²=-8х²+14х+13