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Arbetsblad: Andragradsekvationer

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Andragradsekvationer
Nivå 2 · Heltalslösningar
Lös ekvationerna.
1.
x2+x−56=0x^{2} + x - 56 = 0
x1=x_1 =x2=x_2 =
2.
x2+7x+6=0x^{2} + 7x + 6 = 0
x1=x_1 =x2=x_2 =
3.
x2−64=0x^{2} - 64 = 0
x1=x_1 =x2=x_2 =
4.
x2−4x=0x^{2} - 4x = 0
x1=x_1 =x2=x_2 =
5.
x2−8x+15=0x^{2} - 8x + 15 = 0
x1=x_1 =x2=x_2 =
6.
x2+3x−10=0x^{2} + 3x - 10 = 0
x1=x_1 =x2=x_2 =
7.
x2+5x−24=0x^{2} + 5x - 24 = 0
x1=x_1 =x2=x_2 =
8.
x2−12x+27=0x^{2} - 12x + 27 = 0
x1=x_1 =x2=x_2 =
9.
x2+x=0x^{2} + x = 0
x1=x_1 =x2=x_2 =
10.
x2+5x=0x^{2} + 5x = 0
x1=x_1 =x2=x_2 =
Facit
Andragradsekvationer · Nivå 2 · Heltalslösningar
1.x1=−8,  x2=7x_1 = -8,\; x_2 = 7
2.x1=−6,  x2=−1x_1 = -6,\; x_2 = -1
3.x=±8x = \pm 8
4.x1=4,  x2=0x_1 = 4,\; x_2 = 0
5.x1=5,  x2=3x_1 = 5,\; x_2 = 3
6.x1=−5,  x2=2x_1 = -5,\; x_2 = 2
7.x1=3,  x2=−8x_1 = 3,\; x_2 = -8
8.x1=3,  x2=9x_1 = 3,\; x_2 = 9
9.x1=0,  x2=−1x_1 = 0,\; x_2 = -1
10.x1=0,  x2=−5x_1 = 0,\; x_2 = -5