Uprość wyrażenie.
A) IxI-I-xI+I2xI, jeśli x≤0
B) Ix+3I-IxI, jeśli x≤-3
C) I2xI-√2x²-Ix-1I, jeśli x≥1
D) Ix+2I+Ix-2I+√9-6x+x², jeśli -2 ≤ x ≤ 2
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A) -x-x-2x= -4x
B) -(x+3)+x=-x-3+x= -3
C) 2x-x√2-(x-1)= x(1-√2)+1
D) x+2-(x-2)-(x-3)= -x+7
√2x²= Ix√2I √(x-3)²=Ix-3I