Rationalisaton factor of 7-3root5
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Answer: 94/7+3√5
Step-by-step explanation:
=7-3√5/1
=(7-3√5)(7+3√5)/1 (7+3√5) (The rationalising factor here would be 7+3√5)
=(7)² + (3√5)²/7+3√5 (Using Identity in numerator: (a+b)(a-b)=a²-b²)
=(49) + (45)/7+3√5
=94/7+3√5
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