Question

10x×(х-3)-2.5х×(4х-2) при х=-8

Answer 1

Ответ:

200

Объяснение:

Answer 2

To evaluate the expression 10x(x - 3) - 2.5x(4x - 2) when x = -8, you can substitute -8 for x in the expression and then perform the calculations step by step.

1. Substitute x = -8 into the expression: 10(-8)(-8 - 3) - 2.5(-8)(4(-8) - 2)

2. Perform the calculations inside the parentheses first: 10(-8)(-11) - 2.5(-8)(-34 - 2)

3. Continue simplifying: -880 + 2.5 * 8 * 36

4. Calculate the multiplications: -880 + 720

5. Finally, add the two results: -880 + 720 = -160

So, when x = -8, the expression 10x(x - 3) - 2.5x(4x - 2) evaluates to -160.