Assuming in the second bracket, 3y is to the power of 4:
you put each power seperatly:
5y^4+(-3y^4)
-3y^3+6y^3
2y^2+(-4y^2)
-6y+-4y
5+(-8)
you get:
2y^4
3y^3
-2y^2
-10y
-2
so the answer is 2y^4+3y^3-2y^2-10y-2
Hey there, it doesn't seem like we have a picture. Could you add it in?
Answer:
Step-by-step explanation:
Let's take for example the first one Al(C2H2O2)
If there is no subscript under the number, the amount of atoms is 1
If we have a subscript, as in this case, the subscript is the number of atoms.
In the example above, there is 1 atom of Aluminium, two of Carbon, two of Hydrogen and 2 of Oxygen. If you have parenthesis and number before them, e.g., 4(Al2O3), you just multiply the parenthesis by the number in front of them, which means 4*2=8 aluminium atoms, 3*4=12 oxygen atoms, the same applies if the number is subscript behind the parenthesis like in fourth example.
It's the rectangle, if we rotate it about y-axis, it would create a cylinder..
