2010007903 Level: AChoose the interval which contains all the solutions of the following quadratic equation. 6x2+13x+5=0(−2;−12][12;2)(−32;12](−1;53]
9000020401 Level: ASolve the following quadratic equation. −x2+12x−20=0x1=2, x2=10x1=−2, x2=10x1=−2, x2=−10x1=2, x2=−10
9000020402 Level: AIdentify an equation which does not have real solution.x2−2x+5=0x2−5=0x2+0.8x=0−x2+2x+35=0
9000020403 Level: AIdentify an equation which does not have at least one solution in the interval (0;∞).x2+5x+6=0x2−2x−3=0x2−10x=0x2−10x+24=0
9000020404 Level: AFind a number which is a sum of one half of the bigger solution of x2−10x+24=0 and a double of the smaller solution of −x2+10x−16=0.712614
9000020405 Level: AIdentify an equation which does not have the set K={−3;6} as the set of all solutions of this equation.3x2−9x+54=02x2−6x−36=013x2−x−6=0−x2+3x+18=0
9000020407 Level: AIn the following list identify an equation with real solution.−0.5x2+2x+3=0−x2+4x−5=02x2−3x+3=0x2−x+1=0
9000020408 Level: AWhich of the given equations have at least one root the same? x2+8x+15=0(1)x2−8x+15=0(2)x2+8x−12=0(3)x2−2x−18=0(4)equations (2) and (3)equations (1) and (3)equations (2) and (4)Such a pair does not exist.
9000025601 Level: AWhich of the quadratic equations from the following list has all solutions in the interval [−5;3]?x2−2x−3=0x2−3x−10=0x2−2x−15=0x2−3x−18=0
9000025602 Level: AIn the following list identify a set which contains at least one solution of the quadratic equation x2−121=0.{−11;1;13}{−5;0;5;10}{3;7;9;19}{−15;−12;−7}