Find the value of (4+√5)(4−√5).Is it rational ? [3 MARKS]
Concept : 1 Mark Calculation : 2 Marks (4+√5)(4−√5)=42−(√5)2=16−5=11[using the identity (a+b)(a−b)=(a2−b2)]
11 is a rational number.
Find the value of (√3+√7)2. Is it rational? [4 MARKS]
Find the value of (7+√7)(7−√7). Is it rational? [4 MARKS]
Find (5+√7)(2+√5) .Is it rational? [4 MARKS]
Find 4 rational numbers between 35 and 45 using d=(y−x)n+1 [4 MARKS]