Question

4) (c^2 + 3)(с - 9) - с^2(с - 6) при с= -5.​

Answer 1

Ответ:

$( - 5 ^{2} + 3) \times ( - 5 - 9) + 5 ^{2} \times ( - 5 - 6) = - 22 \times - 14 + 25 \times - 11 = 33$

надеюсь правильно

Answer 2

To evaluate the expression (c^2 + 3)(c - 9) - c^2(c - 6) when c = -5, you can simply substitute -5 for c in the expression and then perform the calculations step by step.

Expression: (c^2 + 3)(c - 9) - c^2(c - 6)

Substitute c = -5:

((-5)^2 + 3)(-5 - 9) - (-5)^2(-5 - 6)

Now, calculate each part of the expression step by step:

1. (-5)^2 + 3 = 25 + 3 = 28
2. (-5 - 9) = -14
3. (-5)^2 = 25
4. (-5 - 6) = -11

Now, substitute these values back into the expression:

(28)(-14) - 25(-11)

Now, perform the multiplications and subtractions:

-392 - (-275)

Now, subtract the negative value:

-392 + 275 = -117

So, when c = -5, the expression (c^2 + 3)(c - 9) - c^2(c - 6) equals -117.