Question

(3-x)^2-X(x-6) при x=-0.7

Answer 1

Решение и ответ:

(3 - x)² - x(x - 6), при x = -0.7

(3 - x)² - x(x - 6) = 3² - 2·3x + x² - x² + 6x = 9 - 6x + 6x = 9

Для решения использовали формулу квадрата разности:

(a - b)² = a² - 2ab + b²

Answer 2

To evaluate the expression (3 - x)^2 - x(x - 6) at x = -0.7, we substitute the value of x into the expression:

(3 - (-0.7))^2 - (-0.7)(-0.7 - 6)

Now, let's simplify the expression step by step:

(3 + 0.7)^2 - (-0.7)(-0.7 - 6) (3.7)^2 - (-0.7)(-6.7) 13.69 - (-0.7)(-6.7) 13.69 - 4.69 9

Therefore, when x = -0.7, the value of the expression (3 - x)^2 - x(x - 6) is 9.