Question

X Y действительны числа . Найти z=-2x^2+2xy

Answer 1

Program ddg2;

var
x, y: Real;

begin
WriteLn('введите x,y');
ReadLn(x, y);
WriteLn('z=', - 2 * sqr(x) + 2 * x * y);
end.

Answer 2

To find the value of z in terms of x and y, given z = -2x^2 + 2xy, you can directly substitute the values of x and y into the expression. There is no unique solution to this equation without specific values for x and y. However, I can show you how to calculate z for any given values of x and y.

Let's say you have specific values for x and y:

1. Substitute the values of x and y into the equation for z.
2. Perform the necessary arithmetic operations to calculate the value of z.

For example, if x = 3 and y = -4, then:

z = -2(3)^2 + 2(3)(-4) z = -2(9) - 24 z = -18 - 24 z = -42

So, when x = 3 and y = -4, the value of z is -42.