Question

0,7√125-1,2√80+0,9√5

Answer 1

Ответ:

-0.4√5

Пошаговое объяснение:

0.7×5√5-1,2×4√5+0,9√5=3√5-4,8√5+0.9√5=-0,4√5

Answer 2

To simplify the given expression, you can calculate each square root separately and then perform the arithmetic operations. Here's how you can do it step by step:

1. Calculate √125: √125 = √(25 * 5) = 5√5

2. Calculate √80: √80 = √(16 * 5) = 4√5

3. Calculate √5: √5 remains as it is.

Now, substitute these values back into the original expression:

0.7 * 5√5 - 1.2 * 4√5 + 0.9√5

Simplify the terms with the same square root:

3.5√5 - 4.8√5 + 0.9√5

Combine the terms with the same square root:

(3.5 - 4.8 + 0.9)√5

Perform the arithmetic operations:

-1.4√5

So, the simplified form of the expression is -1.4√5.