2000004603 Level: AChoose the correct statement about the following equation. 2x−5=2The equation has just one positive root.The equation has just one negative root.The equation has two roots.The equation has no solution in R.
2000004602 Level: AChoose the correct statement about the following equation. 5x+9=x+1The equation has no solution in R.The equation has just one root and the root is an odd number.The equation has just one root and the root is an even number.The equation has just two roots.
2000004610 Level: AChoose the correct statement about the following equation. (x+5)2=x+5The solution of the equation are all x∈[−5;∞).The solution of the equation are all x∈R.The equation has no solution in R.The equation has just one root x=0.
1003177803 Level: CChoose the domain of the expression. 1|3x−9|−2(−∞;3−23)∪(3+23;∞)(−∞;−3−23)∪(3+23;∞)(−∞;−3+23)∪(3+23;∞)(−∞;−3−23)∪(−3+23;∞)
1003177801 Level: CChoose the domain of the expression |x−3|−4.(−∞;−1]∪[7;∞)(−1;3]∪[7;∞)[7;∞)(−∞;1)∪(7;∞)
1003187204 Level: CThe solution set of the equation x2−2x+1−2|x+3|+x+7=0 is:{−7}∪[1;+∞){−7}∪(1;+∞)[1;+∞)(1;+∞)
1003187202 Level: CWhich of following equalities is true for all real numbers x?(x−3)2=|x−3||−x|=x|x−1|=x−1x2=x