7 per √7 - √3 hasilnya brp?

jawaban ada di lampiran

7/(√7 - √3)
= 7/(√7 - √3) x (√7 + √3)/(√7 + √3)
= (7√7 + 7√3)/(√49 + √21 - √21 - √9)
= (7√7 + 7√3)/(7 - 3)
= (7√7 + 7√3)/4
atau
= 1/4 (7√7 + 7√3)
atau
= 7/4 (√7 + √3)