Question

Which expression is equal to the equation?

Answer 1

Answer: $-11\sqrt{7}$

Step-by-step explanation:

To find the expression equal to the given, we will simplify the original.

   Given:

$\displaystyle 2\sqrt{28} -5\sqrt{63}$

   Simplify:

$-11\sqrt{7}$

           Answer:  $-11\sqrt{7}$

Answer 2

Answer:  $-11\sqrt{7}$

Step-by-step explanation:

$2\sqrt{28}-5\sqrt{63}$

= $2\sqrt{4*7}-5\sqrt{7*9}$

= $2*\sqrt{4}*\sqrt{7} - 5*\sqrt{7} *\sqrt{9}$

= $2*2*\sqrt{7} - 5*\sqrt{7}*3$

= $4\sqrt{7} - 15\sqrt{7}$

= $-11\sqrt{7}$