B=(x-3)² A=(x-2)² B-A=(x-3)² - (x-2)² ((B-A=((x-2)+(x-2))((x-3)-(x-2 (B-A(x-3+x-2)(x-3-x+2 (B-A=(2x-5)(-1 B-A=-2x+5 x-3)²<(x-2)²)