Oblicz wartość wyrażenia dla x = 1/2 i dla x= 1/4
a) -2x2 – 6x + 1/2
-2x²-6x+½
I) dla x=½
-2*(½)²-6*½+½ = -2*¼-3+½ = -½-3+½ = -3
II) dla x=¼
-2*(¼)²-6*¼+½ = -2*1/16-3/2+½ = -1/8-3/2+1/2 = -1/8-12/8+4/8 = -9/8
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-2x²-6x+½
I) dla x=½
-2*(½)²-6*½+½ = -2*¼-3+½ = -½-3+½ = -3
II) dla x=¼
-2*(¼)²-6*¼+½ = -2*1/16-3/2+½ = -1/8-3/2+1/2 = -1/8-12/8+4/8 = -9/8