Answer:
Proved below
Explanation:
Question 2.2.3 says we should prove that;
√18 - √128 + 2^(2.5) = -√2
Breaking this down gives;
√(9 × 2) - √(64 × 2) + 2^(5/2)
This gives;
>> 3√2 - 8√2 + (2^(5))^(½)
>> 3√2 - 8√2 + √32
>> 3√2 - 8√2 + √(16 × 2)
>> 3√2 - 8√2 + 4√2
>> (3 - 8 + 4)√2
>> -√2
This is equal to the right hand side and so it is proved.