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#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### High School Mathematics - 212.5 Equations Reducible to Quadratic Form

 Example: Solve x4 + x2 - 12 = 0 Solution: The given equation is not quadratic We reduce it Put x2 = y, then the equation becomes y2 + y - 12 = 0 The factors are y = 3, y = -4 If y = 3, then x2 = 3. Therefore x = +Ö3, -Ö3 If y = , then x = +2i, x = -2i Directions: Solve the following equations
 Q 1: Ö(x/1-x)+ Ö(1-x)/x = 13/64/13, 9/132, 31/3, 1/5 Q 2: x(x+2)(x2-1) = -1Ö2,Ö5(-1+Ö5)/2, (-1-Ö5)/21,5 Q 3: (x2+1/x2) + (x+1/x) - 4= 01,21,5,61,1,(-3+Ö5)/2,(-3-Ö5)/2 Q 4: x2/3+x1/3-2 = 01,51,-81,6 Q 5: (x2-5x)2-30(x2-5x)-216 = 02,41,3,42,3,-4, 9 Q 6: 4x-5.2x+4 = 01, 31, 50, 2 Q 7: 12x-56x3+89x2-56x+12 = 01/2, 2/3, 3/2 and 21, 51, 2/3, 4 Q 8: (x2-5x+7)2-(x-2)(x-3) = 72,3,51,Ö3,51,4,(5+iÖ11)/2, 5-iÖ11)/2 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!