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Dominik [7]
2 years ago
9

Which expression is equal to the equation?

Mathematics
2 answers:
chubhunter [2.5K]2 years ago
7 0

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}

Rom4ik [11]2 years ago
5 0

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}

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