Question

Simplify √80 + √45 - √245

Answer 1

$\sqrt{80} = 4 \sqrt{5} \\ \sqrt{45 } = 3 \sqrt{5} \\ \sqrt{245} = 7 \sqrt{5} \\ 4 \sqrt{5} + 3 \sqrt{5} - 7 \sqrt{5} = 0$

Answer 2

Answer:

0

Step-by-step explanation:

$\sqrt{80} +\sqrt{45} -\sqrt{245}$ = $\sqrt{(16)(5)} +\sqrt{(9)(5)} -\sqrt{(49)(5)}$

                              = $4\sqrt{5} +3\sqrt{5} -7\sqrt{5}$

                              = 0