SOLUTION: The problem is: -3a^2(5ab-3b+7a) I am not sure between two answers, which are: -15a^3b+9a^2b-21a^3 or -36a^3+6a^2b Also can you please tell me if these are correct answers: (3x

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The problem is: -3a^2(5ab-3b+7a) I am not sure between two answers, which are: -15a^3b+9a^2b-21a^3 or -36a^3+6a^2b Also can you please tell me if these are correct answers: (3x      Log On


   



Question 47793: The problem is: -3a^2(5ab-3b+7a) I am not sure between two answers, which are:
-15a^3b+9a^2b-21a^3 or -36a^3+6a^2b
Also can you please tell me if these are correct answers:
(3x-12)(x-1)= 3x^2-15x+12
(8x+y)(8x-y)= 64x^2-y
(3x-12)^2= 9y^2-72y+144
Thank you so much for the help!!!

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
-3a^2(5ab-3b+7a) I am not sure between two answers, which are:
-15a^3b+9a^2b-21a^3 or -36a^3+6a^2b
The 1st is correct
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Also can you please tell me if these are correct answers:
(3x-12)(x-1)= 3x^2-15x+12
Correct
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(8x+y)(8x-y)= 64x^2-y
No: 64x^2-y^2
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(3x-12)^2= 9y^2-72y+144
Correct
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Cheers,
Stan H.