(-х+5)² (-z-2)² (-5а+5х)² (-9-2z)²

(-х+5)²= (5-х)²= 25-2*5*х +х²= 25-10х+х² (-z-2)² = (-z)²- 2*2*(-z) +(2)²= z²+4z+4 (-5a+5x)²= (5x-5a)²= 25x²-50ax+25a² (-9-2z)² = 81 + 36z+4z²