Help guys🙏

<p>a. 5√3 + 7√3</p><p>&nbsp; &nbsp; = (5 + 7)√3</p><p>&nbsp; &nbsp; = 12√3</p><p>&nbsp;</p><p>b. 15√27 + 11√12</p><p>&nbsp; &nbsp; = (15 × √9 × √3) + (11 × √4 × √3)</p><p>&nbsp; &nbsp; = (15 × 3√3) + (11 × 2√3)</p><p>&nbsp; &nbsp; = 45√3 + 22√3</p><p>&nbsp; &nbsp; = 67√3</p><p>&nbsp;</p><p>c. 5√32 - 8√18</p><p>&nbsp; &nbsp; = (5 × √16 × √2) - (8 × √9 × √2)</p><p>&nbsp; &nbsp; = (5 × 4√2) - (8 × 3√2)</p><p>&nbsp; &nbsp; = 20√2 - 24√2</p><p>&nbsp; &nbsp; = -4√2</p><p>&nbsp;</p><p>d. 15√125 - 9√20</p><p>&nbsp; &nbsp; = (15 × √25 × √5) - (9 × √4 × √5)</p><p>&nbsp; &nbsp; = (15 × 5√5) - (9 × 2√5)</p><p>&nbsp; &nbsp; = 75√5 - 18√5</p><p>&nbsp; &nbsp; = 57√5</p><p>&nbsp;</p><p>e. 3√48 + 6√12 - 9√3</p><p>&nbsp; &nbsp; = (3 × √16 × √3) + (6 × √4 × √3) - (9 × √3)</p><p>&nbsp; &nbsp; = (3 × 4√3) + (6 × 2√3) - (9 × √3)</p><p>&nbsp; &nbsp; = 12√3 + 12√3 - 9√3</p><p>&nbsp; &nbsp; = 15√3</p>