(-х+5)² (-z-2)² (-5а+5х)² (-9-2z)²

Question

(-х+5)²
(-z-2)²
(-5а+5х)²
(-9-2z)²

Answer 1

(-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