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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics - 2
1.8 Radicals - Conjugate Surds

a - b is the conjugate of a + .

Example: Rationalise the denominator1/(5-3).
Solution: (1/5-3) x (5+3/5+3
Answer: (5 + 3)/22

Example: Find the rational number equivalent of 2.44.
Solution:

  1. Let x = 2.44---1
  2. Multiply both sides by 100.
  3. 10 x = 24.4---2
  4. Subtract equation 2 from 1
  5. 9x = 22
Answer : 22/9
Directions: Solve the following.
Q 1: Given 3 = 1.732, 5 = 2.2366/(3, find 6/(5-3)
11.5
11.904
12.1

Q 2: Find the rational number equivalent of2.16*
13/5
12/8
13/6

Q 3:
Answer:

Q 4: Evaluate (588 - 5-48)/(1083 - 5-23)
1
2
3

Q 5: Is 1/5 a rational?
Yes
No

Q 6: Rationalise the denominator 1/(3+2-5)
2
1
(32 + 23 +
Q 7: Find the rational number equivalent of 0.13333...
1/3
2/15
2/3

Q 8:
Answer:

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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