9000022305 Level: AFind the domain of the following expression. −x2+16x−63[7;9](−∞;7)∪(9;∞)(−∞;−7]∪[9;∞)(7;9)[−7;9]
9000023806 Level: AIdentify a true statement which concerns to the following equation. 3x+4=xThe solution divides 4.The solution divides 1.The solution divides 2.The solution divides 3.
9000023807 Level: AIdentify a true statement which concerns to the following equation. x+3=x2The solution is a multiple of 2.The solution is a multiple of 4.The solution is a multiple of 8.The solution is a multiple of 12.
9000020009 Level: AChoose the equation which is obtained by squaring both sides of the following equation. 3x+2=x−6x2−15x+34=0x2−3x−38=0x2−3x−34=0x2−15x−38=0
9000020010 Level: AChoose the equation which is obtained by squaring both sides of the following equation. x2−x+5=2x−53x2−19x+20=0x2+3x+20=03x2+x−30=03x2+x+20=0
9000020006 Level: AIdentify a true statement referring to the solution of the following equation. 3x−8=x−6The equation has a unique solution and this solution is an odd number.The equation has two solutions, the sum of these solutions is divisible by 5.The equation has a unique solution and this solution is an even number.The equation does not have a solution in R.