👤

(x-1) totul la a doua + (x+3) totul la a doua - 2(x+2)(x-2)

Răspuns :

( x-1) ²+(x+3) ²-2 ( x+2)(x-2)
= x²-2x+1+x²+3x+9- 2 ( x²-2²)
=x²-2x+1+x²+3x+9-2( x² -4)
=2 x ²-2x+10-2x²+8 ( reduc +2x² cu -2x² )
= -2x+8