Question

преобразуйте выражение в многочлен​

Answer 1

а)

$2x( {x}^{2} - 7x + 3) = 2x \times {x}^{2} - 2x \times 7x + 2x \times 3 = 2 {x}^{3} - 14 {x}^{2} + 6x$

б)

$(7 - a) \times (a + 7) = (7 - a) \times (7 + a) = 49 - {a}^{2}$

в)

${(2y - 4)}^{2} = {(2y)}^{2} - 2 \times 2y \times 4 + {4}^{2} = 4 {y}^{2} - 16y + 16$