Question

35 баллов сделать пример 7 и 8!

Answer 1

$7) \: {(4x - 2y)}^{2} + 16xy = {(4x)}^{2} - 2 \cdot4x \cdot2y + {(2y)}^{2} + 16xy = 16 {x}^{2} - 16xy + 4 {y}^{2} + 16xy = 16 {x}^{2} + 4 {y}^{2}$

$8) \: 24x - 2 {(x + 6)}^{2} = 24x - 2( {x}^{2} + 2 \cdot x \cdot 6 + {6}^{2} ) = 24x - 2( {x}^{2} + 12x + 36) = 24x - 2 {x}^{2} - 24x - 72 = - 2 {x}^{2} - 72$