Question

I2x-7I+9:(-1,5)=4 "I"- ЭТО МОДУЛЬ А НЕ 1

Answer 1

Ответ:

x= - 1,5      или    x=  8,5

Пошаговое объяснение:

I2x-7I+9:(-1,5)=4

I2x-7I-6=4

I2x-7I=4+6

I2x-7I=10

2x-7= - 10               или    2x-7=  10

2x= - 10 +7              или    2x=  10+7

2x= - 3     или    2x=  17

x= - 1,5      или    x=  8,5

Answer 2

I understand that you want to evaluate the expression "I2x-7I+9" at the point (-1, 5) and that "I" denotes the absolute value or modulus. Let's calculate it step by step.

First, let's substitute the value of x as -1 into the expression:

I2(-1) - 7I + 9

Next, let's calculate the absolute value of 2(-1):

I2(-1) = I-2I = 2

Now, the expression becomes:

2 - 7I + 9

Next, let's calculate the absolute value of 7:

I7I = 7

Now, the expression becomes:

2 - 7 + 9

Simplifying further:

2 + 2 = 4

So, when x is -1, the expression evaluates to 4.