factorise 11480=7n²+7n
Answers
Answered by
3
Step By Step Explanation :
7n^2 + 7n = 114807
n(n + 1) = 11480
n(n+1) = 11480 ÷ 7
n(n+1) = 1640
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Answered by
1
Answer:
40 or -41
Step-by-step explanation:
11480=7n²+7n
1640=n²+n
1640=n²+41n-40n
1640=n(n+41)-40n
n(n+41)-40(n+41)=0
n=-41 or n=40
madhushukla642:
Bro its wrong....l
n(n-40n) +40 cannot be equal to the last step and that too equal to 0
†n(n+40n)-40n
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