PDA

View Full Version : 2 problems I am not sure about, please help!!



Alice07
11-01-2008, 03:16 PM
Instruction:Multiply and Simplify
(2a)exponent 2 multiplied by (2a)exponent 6

I have 2 answers that I have come up with, 256exponent 8 or is it (4a)exponent 8
----------------------------------------------------------------------------------------------------
Instruction: Simplify

3(x exponent 2)exponent 3(-2x exponent 4) exponent 2
I have come up with the answer 12x exponent 14, is this correct?

Thank you for your help!!

Subhotosh Khan
11-01-2008, 03:41 PM
Instruction:Multiply and Simplify
(2a)exponent 2 multiplied by (2a)exponent 6

(2\cdot a)^2\cdot (2\cdot a)^6

= \, (2\cdot a)^8

= \, 256\cdot a^8
I have 2 answers that I have come up with, 256exponent 8 or is it (4a)exponent 8
----------------------------------------------------------------------------------------------------
Instruction: Simplify

3(x exponent 2)exponent 3(-2x exponent 4) exponent 2
I have come up with the answer 12x exponent 14, is this correct?

Thank you for your help!!

3\cdot (x^2)^3 \, \cdot \, (-2\cdot x^4)^2

If it is - then you are correct

Denis
11-01-2008, 03:51 PM
(2a)^2 = 4a^2
2a^2 = 2a^2