Question

Long rationalise surds questions
pls help​

Answer 1

Noah mistakenly added 25 and 7 in denominator instead of subtracting in the third step.

Explanation:

Noah had to rationalize the denominator of
`(32)/(5-√(7))`

According to him,

Solving the nominator and denominator

`= (160-32√(7))/(25+5√(7)-5√(7)-7)`

Noah did correctly till this point.

In the next step he add 25 and 7 in the denominator, whereas, it should be subtracted.

Hence,

Noah mistakenly added 25 and 7 in denominator instead of subtracting in the third step.