Question

(0,6 : 0,15)2 - 6,4 ∙ 0,4 + 1,28.​

Answer 1

1)0,6:0,15=4
2)4*2=8
3)6,4*0,4=2,56
4)8-2,56=5,44
5)5,44+1,28=6,72

Answer 2

(0,6:0,15)2=8

6,4×0,4=2,56

8-2,56+1,28= 6,72

Answer 3

To simplify this expression, we need to apply the order of operations (also known as PEMDAS):

1. Parentheses
2. Exponents
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Using this rule, we can simplify the expression as follows:

(0,6 : 0,15)² - 6,4 ∙ 0,4 + 1,28

First, we need to evaluate the expression inside the parentheses.

0,6 : 0,15 can be rewritten as 0,6 ÷ 0,15, which equals 4.

So now our expression becomes:

4² - 6,4 ∙ 0,4 + 1,28

Next, we need to evaluate the exponent 4², which equals 16.

Now our expression becomes:

16 - 6,4 ∙ 0,4 + 1,28

Next, we need to evaluate the multiplication 6,4 ∙ 0,4, which equals 2.56.

Now our expression becomes:

16 - 2.56 + 1.28

Finally, we can simplify the expression by combining the like terms:

13.72

Therefore, the final answer is 13.72.