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Quadratic equations worksheet

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Quadratic equations
Level 2 · Whole-number solutions
Solve the equations.
1.
x2−13x+42=0x^{2} - 13x + 42 = 0
x1=x_1 =x2=x_2 =
2.
x2−x−42=0x^{2} - x - 42 = 0
x1=x_1 =x2=x_2 =
3.
x2+2x−35=0x^{2} + 2x - 35 = 0
x1=x_1 =x2=x_2 =
4.
x2−x−20=0x^{2} - x - 20 = 0
x1=x_1 =x2=x_2 =
5.
x2−15x+56=0x^{2} - 15x + 56 = 0
x1=x_1 =x2=x_2 =
6.
x2−2x−15=0x^{2} - 2x - 15 = 0
x1=x_1 =x2=x_2 =
7.
x2−11x+18=0x^{2} - 11x + 18 = 0
x1=x_1 =x2=x_2 =
8.
x2−5x+6=0x^{2} - 5x + 6 = 0
x1=x_1 =x2=x_2 =
9.
x2−11x=0x^{2} - 11x = 0
x1=x_1 =x2=x_2 =
10.
x2−5x=0x^{2} - 5x = 0
x1=x_1 =x2=x_2 =
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Answer key
Quadratic equations · Level 2 · Whole-number solutions
1.x1=7,  x2=6x_1 = 7,\; x_2 = 6
2.x1=−6,  x2=7x_1 = -6,\; x_2 = 7
3.x1=5,  x2=−7x_1 = 5,\; x_2 = -7
4.x1=5,  x2=−4x_1 = 5,\; x_2 = -4
5.x1=7,  x2=8x_1 = 7,\; x_2 = 8
6.x1=−3,  x2=5x_1 = -3,\; x_2 = 5
7.x1=9,  x2=2x_1 = 9,\; x_2 = 2
8.x1=2,  x2=3x_1 = 2,\; x_2 = 3
9.x1=0,  x2=11x_1 = 0,\; x_2 = 11
10.x1=0,  x2=5x_1 = 0,\; x_2 = 5
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