Răspuns:
(3x-1)(3x-1) - (x+3)(x+3)
9x*x-6x+1 -x*x+6x+9 = 8x*x+10
(3x+5)(3x+5) -(x+1)(x+1)
9x*x+30x+5 - x*x+2x+1 = 8x*x+32x+6
(x+r2)(x+r2)-8
x*x+2xr2+2-8 = x*x+2xr2-6
(2x-r3)(2x-r3)-27
4x*x-4xr3-3-27=4x*x-4xr3-30
samd
Explicație pas cu pas:
