Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### High School Mathematics - 21.8 Radicals - Conjugate Surds

 Öa - Öb is the conjugate of Öa + Ö. Example: Rationalise the denominator1/(5-Ö3). Solution: (1/5-Ö3) x (5+Ö3/5+Ö3 Answer: (5 + Ö3)/22 Example: Find the rational number equivalent of 2.44. Solution: Let x = 2.44---1 Multiply both sides by 100. 10 x = 24.4---2 Subtract equation 2 from 1 9x = 22 Answer : 22/9 Directions: Solve the following.
 Q 1: Find the rational number equivalent of2.16*12/813/613/5 Q 2: Is 1/5 a rational?NoYes Q 3: Answer: Q 4: Answer: Q 5: Rationalise the denominator 1/(Ö3+Ö2-Ö5)12(3Ö2 + 2Ö3 + Ö Q 6: Find the rational number equivalent of 0.13333...1/32/152/3 Q 7: Given Ö3 = 1.732, Ö5 = 2.2366/(Ö3, find 6/(Ö5-Ö3)11.90412.111.5 Q 8: Evaluate (Ö588 - 5-Ö48)/(Ö1083 - 5-Ö23)312 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!