Question

√28 + √175 - √63

Answer 1

\[\Large \sqrt{28}+\sqrt{175}-\sqrt{63}\]



\[\Large 2\sqrt{7}+\sqrt{175}-\sqrt{63}\]



\[\Large 2\sqrt{7}+5\sqrt{7}-\sqrt{63}\]



\[\Large 2\sqrt{7}+5\sqrt{7}-3\sqrt{7}\]



\[\Large \left(2+5-3\right)\sqrt{7}\]



\[\Large 4\sqrt{7}\]



So \[\Large \sqrt{28}+\sqrt{175}-\sqrt{63}=4\sqrt{7}\]

Answer 2

= 2sqrt7 + 5sqrt7 - 3sqrt7 = 4sqrt7