(-2/8)2 =
1/16
-1/6
2/16
4/16
The rationalising factor of 7 - √7 is _____.
7√7
√7
7
(7-√7) (7 + √7 ) =72 - (√7)2
= 49 -7 = 42.7+√7 is the rationalising factor of 7-√7
Two rational numbers a/b and c/d are equal iff ______.
ad = bc
ac = bd
ab = cd
None of these
If x = 5 - 4 √6, then 1/x = ______.
(7/2)o × 2 =
0
2
Which of the following statement is false?
Every surd is an irrational number.
The sum of a rational and irrational number is always irrational
Every irrational number is a surd
The negative of an irrational number is always irrational.
√5 + √5 = _______.
√10
√5
2√5
5
(-3)4 = ______________
81
-18
12
-12
((2/5)2)3 × (1/5)-4 × 5-1 × 1/4
23/53
24/53
24/52
The lowest rationalising factor of 5√2 is _______.
5√2
√2
