My answer doesn't agree with book

S

Spencer Heisel

New member
Joined
Apr 1, 2008
Messages
8
I did the following problem. I get -34. The book says -24. Where am I going wrong?

-3[-2(-2^0 - 5) - (3-2) - |3|]
-3 (10) -1 -3
-30-1-3+ -34
 
-3[-2(-2^0 - 5) - (3-2) - |3|]

Spencer Heisel said:
-3[-2(-2^0 - 5) - (3-2) - |3|]
-3 (10) -1 -3
-30-1-3+ -34
Click to expand...
Kindly reply with the rest of your steps, showing everything you did between the first and second lines, and between the second and third lines, being sure to make your grouping clear. Thank you! :D

Eliz.
 
-3 [-2(-2^0 - 5) - (3-2) - |3|]
-3 [-2 ( -1 -5) - (1) - 3 ]
-3[ -2 (-6) -1 -3 ]

-3 [12 -1 -3]

-36 -1 -3
-40


Okay, now I'm really confused
 
Spencer Heisel said:
-3 [12 -1 -3]
-36 -1 -3
Click to expand...
I'm sorry, but I don't understand the above...? You had:

. . . . .-3(12 - 1 - 3) = -3(8)

...or:

. . . . .-3(12 - 1 - 3) = -3(12) - 3(-1) - 3(-3)

How did you get to "-36 - 1 - 3"? Please reply with the rest of your steps. Thank you! :D

Eliz.
 
Ques. -3[-2(-2^0 - 5) - (3-2) - |3|]

To begin with, let us solve the round brackets first
-3[-2(-1-5)- (3-2) - |3|] {Any number raised to the power 0 is always 1. So, -2^0 becomes -1. This where you went wrong.}

-3[-2(-6)- (1) -3] {Absolute value of 3 is 3}

-3[-2(-6) -1-3]

-3[12-1-3] {-2*-6 is +12}

-3[12-4]

-3[8]

Answer= -24
 
Your 10 is positive in your second step in the very first post when it should be negative.
 
You must log in or register to reply here.
Top