Question

X2+2xc+c2 при x=5 и c=−19​

Answer 1

Ответ:

2•2+2•2•(-4)+(-4)•2= 4-16-8= -20

Объяснение:

вот только чифры поставь другие ну у тебя должно получится -218

Answer 2

To evaluate the expression $x^2 + 2xc + c^2$ at $x = 5$ and $c = -19$, simply substitute the values of $x$ and $c$ into the expression and perform the calculations:

$x^2 + 2xc + c^2 = (5)^2 + 2 \cdot (5) \cdot (-19) + (-19)^2.$

Calculating each part of the expression:

1. $5^2 = 25$.
2. $2 \cdot (5) \cdot (-19) = -190$.
3. $(-19)^2 = 361$.

Now, summing up these values:

$25 - 190 + 361 = 196.$

So, $x^2 + 2xc + c^2$ when $x = 5$ and $c = -19$ is equal to 196.