Okay so my friend is helping me on homework, and we both got two different answers for a problem. And I really wanna know if im not doing my math right or something... So heres the problem. 7^2-2[4+3(16/2(4))-1]. She got -149 and I got 31.

Question

ganeshie8 · Answer

PEMDAS

anonymous · Answer

I think I did PEMDAS. I could have done it wrong or something though.

ganeshie8 · Answer

7^2-2[4+3(16/2(4))-1]

7^2-2[4+3(8(4))-1]

7^2-2[4+3*32-1]

ganeshie8 · Answer

hope you can work out the rest.... .?

anonymous · Answer

$$7^2-2[4+3({16\over2}(4))-1]$$

anonymous · Answer

Remember the brackets.

anonymous · Answer

it's probably called parentheses* in your country.

anonymous · Answer

49-2(7*31)

49-2(217)

49-434

= - 385

anonymous · Answer

-385 is not the answer.

anonymous · Answer

She was right. I did the whole PEMDAS stuff wrong i guess. because 3x32 is 96 so its 4+96-1 which is 99 so then its 49-2(99) and then its 49-198... so yeah. I guess I can now trust her with math!(:

anonymous · Answer

You got it. Sometimes it's just careless mistakes. I do it all the time. :/

anonymous · Answer

Haha, yeah.. Same here! Obviously. (:

anonymous · Answer

;) we'll get there. Practice makes perfect-ish i guess!

anonymous · Answer

True!

anonymous · Answer

7^2-2[4+3*32-1]

49 - 2( 4 + 96 - 1)

49 - 2( 99)

49 - 198 = - 149