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Matematika SMP Kelas VIII
1] (2/3) (2x - 10) = 5x + 5
4x - 20 = 15x + 15
15x - 4x = - 20 - 15
11x = - 35
x = -35/11
x = -3 2/11
HP = { -35/11 }
2] x - 1 < (6x + 2)/5
5x - 5 < 6x + 2
5x - 6x < 2 + 5
-x < 7
x > -7
3] y = x² + 2
a = 1; b = 0; c = 2
sumbu simetri = -b/2a
sumbu simetri = -0/(2 . 1)
sumbu simetri = 0