Question

Очень срочно прошу!!
Пожалуйста помогите умоляю !

Answer 1

1.
$1.(2x - 3)(4x + 1) = 8x {}^{2} + 2x - 12x - 3 = 8x {}^{2} - 10x - 3$
$2.(3x - y)(2y - 7x) =1 3xy - 21x {}^{2} - 2y {}^{2}$
$3.a(a + 4) - (a - 2)(a + 6) = a {}^{2} + 4a - (a {}^{2} + 4a - 12) = a {}^{2} + 4a - a {}^{2} - 4a + 12 = 12$
$4.(1 - 3p)(9p {}^{2} + 3p + 1) = 9p {}^{2} + 3p + 1 - 27p {}^{3} - 9p {}^{2} - 3p = 1 - 27 p{}^{3}$
2.
$1.3x {}^{3} + x {}^{2} + 3x + 1 = (3x + 1)(x {}^{2} + 1)$
$2. = (x + y)(2 - x)$