Question

√28-10√7

√3+√75-√176

Answer 1

√28-10√7

√7x2x2 - 10√7

2√7 - 10√7

-8√7

28l7

   4l2

    2l2

      1

√3 + √75 - √176

√3 + √3x5x5 - √2x2x2x2x11

√3 + 5√3 - 4√11

6√3 - 4√11

75l3

25l5

   5l5

     1

176l2

  88l2

   44l2

    22l2

     11l11

         1

Answer 2

$\sqrt{4.7} - 10\sqrt{7} = 2 \sqrt{7} - 10 \sqrt{7} = - 8 \sqrt{7} ;$ $\sqrt{3} + \sqrt{25.3} - \sqrt{16.11} = \sqrt{3} + 5\sqrt{3} - 4 \sqrt{11} =6 \sqrt{3} - 4 \sqrt{11}$