can you do the example sum which you have given above step by step and show me ?

Asked by meghanavincent25 | 24th Jun, 2017, 09:28: PM

Expert Answer:

begin mathsize 16px style square root of 2 straight x minus 7 end root minus 3 equals 4 Now space before space we space take space the space square space root space on space both space sides comma space we space need space to space isolate space the space radical space term. So comma space we space get space square root of 2 straight x minus 7 end root equals 7 Now space to space remove space the space radical space comma space we space square space both space sides comma space so space we space get open parentheses square root of 2 straight x minus 7 end root close parentheses squared equals 7 squared rightwards double arrow 2 straight x minus 7 equals 49 rightwards double arrow 2 straight x equals 56 rightwards double arrow straight x equals 28 Hope space this space clears space your space doubt. space Thank space you. Y o u space c a n space t r y space t h e space f o l l o w i n g space p r o b l e m space i f space y o u space w i s h space a n d space g e t space b a c k space w i t h space y o u r space d o u b t s. square root of 7 x squared plus 15 x end root minus 2 x equals 5 plus x end style
 
Hint: Remember to keep the radical term to one side before you square the sides.

Answered by Rebecca | 26th Jun, 2017, 07:07: AM

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