Question

(d+10)(-d-10)+10(2d-1) при d=7

Answer 1

Ответ:

-159

Пошаговое объяснение:

(7+10)*(-7-10)+10(2*7-1) = 17*(-17)+10*(14-1) = -289+10*13 = -289+130 = -159

Answer 2

To evaluate the expression (d+10)(-d-10)+10(2d-1) when d=7, we substitute the value of d into the expression and perform the calculations.

Substituting d=7, we have:

(7+10)(-7-10)+10(2(7)-1)

Now let's simplify each part separately:

(7+10) = 17 (-7-10) = -17 2(7) = 14

Now substitute the simplified values back into the expression:

17(-17) + 10(14-1)

-289 + 10(13)

Next, we perform the multiplication:

-289 + 130

Finally, we add the two terms:

-289 + 130 = -159

Therefore, when d=7, the expression (d+10)(-d-10)+10(2d-1) equals -159.