Question

-3x²+7 при x = - 5......... ​

Answer 1

Ответ:

-68

Объяснение:

5*5=25

-3*25=-75

-75+7=-68

Answer 2

To find the value of the expression -3x² + 7 when x = -5, substitute -5 for x in the expression and perform the calculation:

-3(-5)² + 7

First, calculate -5², which is equal to 25:

-3(25) + 7

Next, multiply -3 by 25:

-75 + 7

Finally, subtract 75 from 7:

-68

Therefore, when x = -5, the value of the expression -3x² + 7 is -68.