Question

5x - 3 (x+2) (модуль) при x = -2,y = -4

Answer 1

-10-3*|-2+2|=-10-3*0=-10

Answer 2

To evaluate the expression 5x - 3|x + 2| at x = -2, we need to substitute the value of x into the expression and then calculate the absolute value of (x + 2) when x = -2.

Let's go step by step:

1. Substitute x = -2 into the expression: 5x - 3|x + 2| = 5(-2) - 3|-2 + 2|

2. Calculate the absolute value of (-2 + 2): | -2 + 2 | = | 0 | = 0

3. Substitute the absolute value into the expression: 5(-2) - 3(0) = -10 - 0 = -10

So, when x = -2, the value of the expression is -10. Now, let's check the given value of y = -4:

5x - 3|x + 2| at x = -4:

1. Substitute x = -4 into the expression: 5x - 3|x + 2| = 5(-4) - 3|-4 + 2|

2. Calculate the absolute value of (-4 + 2): | -4 + 2 | = | -2 | = 2

3. Substitute the absolute value into the expression: 5(-4) - 3(2) = -20 - 6 = -26

So, when x = -4, the value of the expression is -26.