Question

((m(m + 1)) \div 2) { }^{2} + (m + 1) ^{3}​

Answer 1

m - (m - 1)/2 = 1- (m - 2)/3

(2m - m + 1)/2 = (3 - m + 2)/3

(m + 1)/2 = ( 5 - m)/3

3(m + 1) = 2(5 - m)

3m + 3 = 10 - 2m

3m + 2m = 10 - 3

5m = 7

m = 7/5