Simplify each of the following by rationalizing the denominator.
7+3√5/7-3√5
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In order to rationalise the denominator, we first multiply the numerator and denominator by the conjugate of the denominator
{ Conjugate simply means the denominator but with negative sign , for example if the denominator is x+y , the conjugate would be x-y }
Properties used
• (a+b) squared = a square + b square + 2ab
• (a+b)(a-b) = a square - b square
Hope this helps you
{ Conjugate simply means the denominator but with negative sign , for example if the denominator is x+y , the conjugate would be x-y }
Properties used
• (a+b) squared = a square + b square + 2ab
• (a+b)(a-b) = a square - b square
Hope this helps you
Attachments:
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