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7.23 Уравнението (ax + b)(cx + d) = 0

    Задачи Тип А Задачи Тип Б Задачи Тип C
    1 $(x – 2)(x + 6) = 0$ $(x – 3)(x + 5) = 0$ $(x + 4)(x – 7) = 0$
    2 $(2x – 4)(5x + 15) = 0$ $(2x – 6)(3x + 12) = 0$ $(3x – 15)(4x + 8) = 0$
    3 $(0{,}2x – 1)\left(\frac{1}{4}x + 2\right) = 0$ $(0{,}5x – 2)\left(\frac{1}{3}x + 1\right) = 0$ $(1{,}5x – 3)\left(\frac{2}{5}x – 2\right) = 0$
    4 $(-x + 5)(3x + 6) = 0$ $(-x + 4)(2x + 9) = 0$ $(-3x + 6)(-2x – 5) = 0$
    5 $x(3x – 5) = 0$ $x(2x – 7) = 0$ $3x(5x + 2) = 0$
    6 $-3x(2x – 5) = 0$ $-2x(3x – 1) = 0$ $-4x(0{,}5 – 2x) = 0$
    7 $4(x – 3)(3x + 2) = 0$ $5(x – 1)(2x + 3) = 0$ $-3(3x + 4)(5x – 2) = 0$
    8 $x(x – 4)(x + 1) = 0$ $x(x – 2)(x + 3) = 0$ $2x(3x – 1)(2x + 5) = 0$
    9 $x^2 – 6x = 0$ $x^2 – 5x = 0$ $3x^2 + 12x = 0$
    10 $3x^2 – 9x = 0$ $4x^2 – 10x = 0$ $6x^2 + 15x = 0$
    11 $x^2 – 25 = 0$ $x^2 – 16 = 0$ $x^2 – 49 = 0$
    12 $9x^2 – 16 = 0$ $4x^2 – 25 = 0$ $9x^2 – 64 = 0$
    13 $x^2 – 0{,}09 = 0$ $x^2 – 0{,}04 = 0$ $0{,}25x^2 – 1{,}44 = 0$
    14 $(x + 2)^2 – 16 = 0$ $(x + 1)^2 – 9 = 0$ $(2x – 3)^2 – 16 = 0$
    15 $(x + 2)^2 – (2x – 3)^2 = 0$ $(x + 3)^2 – (2x – 1)^2 = 0$ $(3x – 2)^2 – (x + 4)^2 = 0$
    16 $x^2 – 8x + 16 = 0$ $x^2 – 6x + 9 = 0$ $4x^2 + 12x + 9 = 0$
    17 $16x^2 – 24x + 9 = 0$ $25x^2 – 20x + 4 = 0$ $9x^2 + 30x + 25 = 0$
    18 $(x – 3)(x + 4) + (x – 3)(2x – 5) = 0$ $(x – 2)(x + 3) + (x – 2)(2x – 1) = 0$ $(2x + 1)(x – 4) + (2x + 1)(3x + 2) = 0$
    19 $(2x – 3)(3x + 1) – (2x – 3)(x – 4) = 0$ $(3x – 1)(2x + 5) – (3x – 1)(x – 2) = 0$ $(4x – 3)(x + 2) – (4x – 3)(3x – 1) = 0$
    20 $(x – 2)(x + 5) = 3(x – 2)$ $(x – 1)(x + 4) = 2(x – 1)$ $(2x + 3)(x – 2) = 5(2x + 3)$
    21 $(2x – 5)(x + 2) = (2x – 5)(3x – 4)$ $(3x – 2)(x + 1) = (3x – 2)(2x – 5)$ $(4x + 1)(3x – 2) = (4x + 1)(x + 8)$
    22 $(x – 4)^2 = (3x + 2)^2$ $(x – 5)^2 = (2x + 1)^2$ $(3x – 1)^2 = (x + 5)^2$
    23 $x^2 + 4x + 3x + 12 = 0$ $x^2 + 3x + 2x + 6 = 0$ $2x^2 + 4x + 3x + 6 = 0$
    24 $x^2 – 4x – 2x + 8 = 0$ $x^2 – 5x – 3x + 15 = 0$ $3x^2 – 6x – x + 2 = 0$
    25 $x^2 + 6x + 8 = 0$ $x^2 + 5x + 6 = 0$ $x^2 – 7x + 12 = 0$
    26 $x^2 – 2x – 8 = 0$ $x^2 – x – 6 = 0$ $x^2 + 2x – 15 = 0$
    27 $x^3 – 16x = 0$ $x^3 – 9x = 0$ $4x^3 – 25x = 0$
    28 $x^3 – 5x^2 = 0$ $x^3 – 4x^2 = 0$ $3x^3 + 12x^2 = 0$
    29 $(x^2 – 9) + (x – 3)(3x + 2) = 0$ $(x^2 – 4) + (x – 2)(2x + 1) = 0$ $(x^2 – 9) – (x + 3)(3x – 5) = 0$
    30 $x^3 – 2x^2 – 9x + 18 = 0$ $2x^3 – 3x^2 – 8x + 12 = 0$ $x^4 + 4 = 0$
    31 $2x^2 + 5x + 3 = 0$ $3x^2 – 7x + 2 = 0$ $x^3 – 3x + 2 = 0$
    32 $x^4 – 5x^2 + 4 = 0$ $x^4 – 13x^2 + 36 = 0$ $(x + 1)(x + 2)(x + 3)(x + 4) – 24 = 0$
    33 $(x^2 – 1)(x + 2) – (x – 1)(x + 2)^2 = 0$ $(x^2 – 4)(2x – 1) – (x + 2)(4x^2 – 1) = 0$ $(x – 1)(x – 2)(x + 3)(x + 4) – 36 = 0$

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