rationalise 3by √3+√5-√2
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3 − 2+ 53= 3− 2+ 53. 3 − 2 − 5 3 − 3− 5= ( 3−2 ) 2−( 5) 23( 3− 2 − 5 )= 3+2−2 6−53( 3 − 2− 5)= −2 63( 3− 2 − 5)= −2 63( 3 − 2 − 5) × 66= −123( 18− 12 − 30)= −43 2−2 3− 30= 42 3 +30−3 2
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