Question

Упростить √ 45+ √20-√ 320

Answer 1

 $\sqrt{45}+\sqrt{20}-\sqrt{320}=3 \sqrt{5} +2 \sqrt{5}-8 \sqrt{5}=-3 \sqrt{5}$

Answer 2

√45 can be simplified to 3√5, √20 can be simplified to 2√5, and √320 can be simplified to 4√5.

So the expression becomes: 3√5 + 2√5 - 4√5.

Combining like terms, we get: 3√5 + 2√5 - 4√5 = (3 + 2 - 4)√5 = 1√5 = √5.

Therefore, the simplified expression is √5.