Question

Функция задана формулой y=х2-21.найдите значение функции при х=4/ 1)16 2)-13 3)-5 4)4

Answer 1

... .............. .........

Answer 2

To find the values of the function $y = x^2 - 21$ for the given values of $x$, simply substitute each $x$ value into the formula and calculate $y$. Let's do that for each option:

1. $x = 16$ $y = 16^2 - 21 = 256 - 21 = 235$

2. $x = -13$ $y = (-13)^2 - 21 = 169 - 21 = 148$

3. $x = -5$ $y = (-5)^2 - 21 = 25 - 21 = 4$

4. $x = 4$ $y = 4^2 - 21 = 16 - 21 = -5$

So, the values of the function for each given $x$ are:

1. $y = 235$
2. $y = 148$
3. $y = 4$
4. $y = -5$

Therefore, the correct answer is: 4) $y = -5$ when $x = 4$