Odpowiedź:
1. (2x - 4)(-3x - 2) = -2x * 3x - 2x * 2 - 4 * (-3x) - 4 * (-2) = [tex]-6x^{2}[/tex] - 4x + 12x + 8 = [tex]-6x^{2}[/tex] + 8x + 8
2. (5a - b)(7x - 3) = 5a * 7x - 5a * 3 - 7bx - b * (-3) = 35ax - 15a - 7bx + 3b
3. [tex](2x + 3 )^{2} =[/tex] (2x)^2+ 2 * 2x * 3 + 3^2 = 4x^2 + 12x + 9
4. (x - 2)(x + 3y - 6) = x * (x + 3y - 6) - 2(x + 3y - 6) = x^2 + 3xy - 6x - 2x - 6y + 12 = x^2 + 3xy - 8x - 6y +12
5. (x + 3)(x - 3)(x + 1) = (x^2 - 9) * (x + 1) = x^3 + x^2 - 9x - 9
Szczegółowe wyjaśnienie:
