Question

(a-2)(a+5) - (a+5)(a-4)=при x = -4.5​

Answer 1

Ответ:

1

Пошаговое объяснение:

Здесь нету x. Предположим, что имеется в виду a.

$(a-2)(a+5)-(a+5)(a-4)=(a+5)((a-2)-(a-4))=(a+5)(a-2-a+4)=2(a+5)$

При $a=-4.5$

$2(a+5)=2(-4.5+5)=2*0.5=1$

Answer 2

To find the value of the expression (a-2)(a+5) - (a+5)(a-4) when x = -4.5, we can substitute -4.5 for 'a' in the expression and calculate the result.

Let's substitute -4.5 for 'a':

((-4.5) - 2) * ((-4.5) + 5) - ((-4.5) + 5) * ((-4.5) - 4)

Simplifying the expression:

(-6.5) * (0.5) - (0.5) * (-8.5)

(-3.25) - (-4.25)

-3.25 + 4.25

0.9999999999999991

Therefore, when x = -4.5, the value of the expression (a-2)(a+5) - (a+5)(a-4) is approximately 0.9999999999999991.