Question

упростите выражение​

Answer 1

$- 2x(x - 3) + 4(x + 1) = \\ = - 2x \times x + ( - 2x) \times ( - 3) + 4 \times x + 4 \times 1 = \\ = - 2x {}^{2} + 6x + 4x + 4 = \\ = - 2x {}^{2} + 10x + 4$