Question

5x-6•|x-7|+2при x=4​

Answer 1

Ответ:

5×4-6(4-7)+2=14×(-3)+2=-42+2=-40

Answer 2

To evaluate the expression 5x - 6 * |x - 7| + 2 at x = 4, you need to substitute x with 4 and perform the calculations following the order of operations (PEMDAS/BODMAS).

Given the expression: 5x - 6 * |x - 7| + 2

Substitute x with 4: 5 * 4 - 6 * |4 - 7| + 2

Now, calculate the absolute value inside the absolute value brackets: |4 - 7| = |-3| = 3

Substitute the absolute value back into the expression: 5 * 4 - 6 * 3 + 2

Perform the multiplications and additions/subtractions: 20 - 18 + 2

Now, sum up the numbers: 20 - 16 = 4

So, when x = 4, the value of the expression 5x - 6 * |x - 7| + 2 is 4.