Page 25 - E booklet prep 2_Neat
P. 25
Example(3):
Write each of the following such that the denominator is an integer:
1) 9 2) - 3
v3 v2
Solution:
1) ?? x v?? = 3 v??
v?? v??
2) -?? x v?? = -?? v??
v?? v?? ??
Example (4): Note that: (a + b)2 = a2 + 2ab+ ????
If x = 5v3 - 2 , ?? = 5 v3 + 2 + b2
Find the value of the expression: ??2 + 2 ???? + ??2
Solution:
???? + ?? ???? + ???? = ( X + Y )2
= ( ??v?? - ?? + ??v?? + ?? )??
= (????v??)??
= 300
1ST TERM MATH-PREP.2
25 | P a g e
