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(√8-4x)² < 4²
8 - 4x < 16
-4x < 16-8
x > 8/-4
x > -2
x = { -1,0,1,2,3,...}
Langkah 1 :
8-4x > 0
-4x > -8
x < 2.......(1)
Langkah 2 :
{√(8-4x)}² < 4²
8-4x < 16
-4x < 16-8
-4x < 8
x > -2......(2)
Himpunan penyelesaiannya adalah irisan dari (1) dan (2).
HP : -2 < x < 2