SOLUTION: i need help for me to pass my course i need to find the answers to these remove brackets and collect like terms for the following expressions A) 5(2a-b) B) (3x+2)-(4x-Y)

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Question 199318: i need help for me to pass my course i need to find the answers to these
remove brackets and collect like terms for the following expressions
A) 5(2a-b)
B) (3x+2)-(4x-Y)
C) 3x(x+3)+x squared
D) (x+y)(x-2y)

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
remove brackets and collect like terms for the following expressions
A) 5(2a-b)
= 10a - 5b
------------------------
B) (3x+2)-(4x-Y)
= 3x+2-4x+Y
= -x + 2 + Y
-----------------------
C) 3x(x+3)+x squared
= 3x^2 + 9x + x
= 3x^2 + 10x
-----------------------
D) (x+y)(x-2y)
Use FOIL:
F:x*x = x^2
O:x*-2y = -2xy
I:y*x = xy
L:y*-2y = -2y^2
----------------------
Combine to get x^2 -xy -2y^2
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Cheers,
Stan H.