Question

3 √45 +1\4 √80 -7 √20

Answer 1

Ответ:

Удачи закончить учебный год на отлично

Answer 2

To simplify the given expression, let's first simplify each of the radicals:

1. √45 = √(9 * 5) = 3√5
2. √80 = √(16 * 5) = 4√5
3. √20 = √(4 * 5) = 2√5

Now, plug these values back into the expression:

3√45 + 1/4 √80 - 7√20 = 3(3√5) + (1/4)(4√5) - 7(2√5) = 9√5 + √5 - 14√5

Combine the like terms:

(9√5 + √5 - 14√5) = (9 - 14)√5 + √5 = -5√5 + √5 = -4√5

So, the simplified expression is -4√5.