Thread: Can anyone show me the solution to these answers step by step?

|2² - 3²| - |5 - 7|
The answer, according to the book is -1 but the answer I keep getting is 1



(3 - √9) - (-5 - 1.3)

-3

My book says the answer is -2.1; I don't know why or how my they subtracted subtracted .2 from 1.3. I need the solutions, all help is appreciated, please and thank you!

Originally Posted by markb1990

|2² - 3²| - |5 - 7|
The answer, according to the book is -1 but the answer I keep getting is 1 <--- wow!

Are you sure that you posted the problem correctly??

$\displaystyle |2^2-3^2|-|5-7| =$

$\displaystyle |4-9|-|5-7| =$

$\displaystyle |-5|-|-2| =$

$\displaystyle \boxed{5-2 = 3 }$

(3 - √9) - (-5 - 1.3)

-3

My book says the answer is -2.1; I don't know why or how my they subtracted subtracted .2 from 1.3. I need the solutions, all help is appreciated, please and thank you!

1. The answer in the book is correct.

2. $\displaystyle \frac{\overbrace{(3-\sqrt{9})}^{= 0}-(-5-1.3)}{-3}=$

$\displaystyle \frac{-(-6.3)}{-3}=$

$\displaystyle \boxed{\frac{(-3)(-2.1)}{-3}= -2.1}$

Sadly yes the book is right. I'm getting 3 and 1 the ways I did it but I can't seem to reach -1



For the second part, I understand that -(-5 -1.3)/ -3 = -(-6.3)/ -3, but may I ask what you did in the boxed part? Why did you factor (- 6.3) and what happened to the - sign outside the parenthesis?

Thank you

I am assuming the first problem was #67 in your text. You did not copy it down correctly. The textbook's solution is correct. 2 is cubed, not squared.