Answer:
B. -x³ - 9x².
Step-by-step explanation:
- (3x³ + x²) +2 (x³ - 4x²)
= -3x³ + 2x³ - x² - 8x²
= -x³ - 9x²
Answer:
In mathematics, an abelian group, also called a commutative group, is a group in which the result of applying the group operation to two group elements does not depend on the order in which they are written. That is, the group operation is commutative.✨
Step-by-step explanation:
Hope it is helpful
hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა
⊱┈────────────────────────┈⊰
![\huge{ \rm{Answer:}}](https://tex.z-dn.net/?f=%5Chuge%7B%20%5Crm%7BAnswer%3A%7D%7D)
The roots of the equation are 7 and -4, because 7 - 4 = 3 and 7. - 4 = -28
Step-by-step explanation:
The positive number is equal to 7.
Assuming that the number is equal to "x" we have:
![\begin{gathered}x^2 = 3x + 28\\\\x^2 - 3x - 28 = 0\\\\a = 1\\\\b = -3\\\\c = -28\\\end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7Dx%5E2%20%3D%203x%20%2B%2028%5C%5C%5C%5Cx%5E2%20-%203x%20-%2028%20%3D%200%5C%5C%5C%5Ca%20%3D%201%5C%5C%5C%5Cb%20%3D%20-3%5C%5C%5C%5Cc%20%3D%20-28%5C%5C%5Cend%7Bgathered%7D)
By the sum and product method, we have:
![\begin{gathered}S = -b / a\\\\S = -(-3) / 1\\\\S = 3\\\\\end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7DS%20%3D%20-b%20%2F%20a%5C%5C%5C%5CS%20%3D%20-%28-3%29%20%2F%201%5C%5C%5C%5CS%20%3D%203%5C%5C%5C%5C%5Cend%7Bgathered%7D)
![\begin{gathered}P= c / a\\\\P = 28 / 1\\\\P = 28\\\\\end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7DP%3D%20c%20%2F%20a%5C%5C%5C%5CP%20%3D%2028%20%2F%201%5C%5C%5C%5CP%20%3D%2028%5C%5C%5C%5C%5Cend%7Bgathered%7D)
The function f (x) = x ^ 2 - 2 is given
It is asked to find the graph of f (5x)
So where the x goes we must now place "5x"
In this way the function is as shown below:
f (5x) = (5x)² -2
f (5x) = 25x² -2
The graph of this function is shown in the attached image.
You would need to break it down and add it more