12�ã7-1-�ã7-5
To solve the expression 12�ã7-1-�ã7-5, we can follow the order of operations (also known as PEMDAS):
1. Parentheses: There are no parentheses in the expression, so we move to the next step.
2. Exponents: There are no exponents in the expression, so we move to the next step.
3. Multiplication and Division: There are no multiplication or division operations in the expression, so we move to the next step.
4. Addition and Subtraction: We perform addition and subtraction from left to right.
Starting with 12�ã7, we calculate the result:
12 + 7 = 19
Now we revise the expression:
19 - 1 - �ã7 - 5
Next, we perform the subtraction:
19 - 1 = 18
The expression becomes:
18 - �ã7 - 5
Finally, we evaluate �ã7 which is another way of representing the square root of 7:
√7 ≈ 2.65 (rounded to two decimal places)
Substituting the value of �ã7 back into the expression:
18 - 2.65 - 5
Now we subtract the remaining numbers:
18 - 2.65 = 15.35
15.35 - 5 = 10.35
Therefore, the value of the expression 12�ã7-1-�ã7-5 is approximately 10.35.