Question 1 Report
Simplify 3−5n91−n×27n+1
Answer Details
3−5n91−n×27n+1 3 − 5 n 9 1 − n × 27 n + 1 3−5n32(1−n)×33(n+1) 3 − 5 n 3 2 ( 1 − n ) × 3 3 ( n + 1 ) 3−5n÷32(1−n)×33(n+1) 3 − 5 n ÷ 3 2 ( 1 − n ) × 3 3 ( n + 1 )
3−5n−2(1−n)+3(n+1) 3 − 5 n − 2 ( 1 − n ) + 3 ( n + 1 )
3−5n−2+2n+3n+3 3 − 5 n − 2 + 2 n + 3 n + 3 3−5n+5n+3−2 3 − 5 n + 5 n + 3 − 2 31 3 1 = 3