Combining like terms with distribution - Problem with answer for -2+2(-4p+1) #30276

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KhanBugz opened this Issue Sep 16, 2012 · 0 comments

2 participants

@KhanBugz

I got the answer -8p or -8p+0 and i put it in the box but it tells me to try again i've even used the hints to see the answer and put that in the box but it won't work so i'm stuck on that problem

combining_like_terms_2.html?seed=112&problem=c_fd_fbx

Answer timeline

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Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3

MathJax is loaded, ready, queue length: 0

User hash: 785044007

@beneater beneater added a commit that closed this issue Sep 18, 2012
@beneater beneater Handle case in combining_like_terms_2 where constant terms simplify to 0
Summary:
fix #26874; fix #29882; fix #29943; fix #29949; fix #29964; fix #29969;
fix #30088; fix #30091; fix #30108; fix #30118; fix #30138; fix #30177;
fix #30205; fix #30257; fix #30258; fix #30276; fix #30279; fix #30280

Previously, the last hint would show something like "-24a + 0" and the regex
answer would expect you to type "-24a0". This fixes the final hint to show just
"-24a" and the answer regex expects "-24a"

Test Plan:
Tested these problematic seeds outside devappserver (before and after the fix):
http://localhost:8000/exercises/combining_like_terms_2.html?debug&seed=112&problem=c_fd_fbx
http://localhost:8000/exercises/combining_like_terms_2.html?debug&seed=177&problem=c_fd_fbx
http://localhost:8000/exercises/combining_like_terms_2.html?debug&seed=161&problem=c_fd_fbx

Reviewers: stephanie

Reviewed By: stephanie

Differential Revision: http://phabricator.khanacademy.org/D742
8183d56
@beneater beneater closed this in 8183d56 Sep 18, 2012
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