Question

Rationalise the denominator of:
4√7
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Answer 1

Answer:

4 / ( √7 + √3 )

By multiplying numerator and denominator by ( √7 - √3 ).

= 4 ( √7 - √3 ) ÷ ( √7 + √3 ) ( √7 - √3 )

=  4(√7 - √3 ) ÷ { (√7)² - (√3)² }

= 4 ( √7 - √3 ) ÷ ( 7 - 3 )

= 4 ( √7 - √3 ) ÷ 4

= 4 ( √7 - √3 ) × 1/4

= ( √7 - √3 ).

Step-by-step explanation:

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Answer 2

Answer:

refer the above attachment..

but you are not written the ➗ sign. b/w 4and √7