Question

(x-7)(x+2)-(x+9)(x-14) якщо x= -1/5​

Answer 1

Ответ:

(x-7)(x+2)-(x+9)(x-14)

x^2+2x-7x-14-(x^2-14x+9x-126)

x^2+2x-7x-14-x^2+14x-9x+126

112

Объяснение:

Значения икса не зависит от ответа

Answer 2

To find the value of the expression (x-7)(x+2)-(x+9)(x-14) when x = -1/5, we substitute -1/5 for x and simplify:

(-1/5 - 7)(-1/5 + 2) - (-1/5 + 9)(-1/5 - 14)

Let's simplify each term separately:

(-1/5 - 7) = -36/5 (-1/5 + 2) = 9/5 (-1/5 + 9) = 44/5 (-1/5 - 14) = -71/5

Now, let's substitute these values back into the expression:

(-36/5)(9/5) - (44/5)(-71/5)

To multiply fractions, we multiply the numerators together and the denominators together:

(-36/5)(9/5) = (-369)/(55) = -324/25 (44/5)(-71/5) = (44*-71)/(5*5) = -3124/25

Now we can simplify further:

-324/25 - (-3124/25) = -324/25 + 3124/25 = (3124 - 324)/25 = 2800/25 = 112/1 = 112

Therefore, when x = -1/5, the expression (x-7)(x+2)-(x+9)(x-14) equals 112.