(a) 2t - 5m - 7t + 9m
= (2t - 7t) + (-5m + 9m)
= -5t + 4m
(b) 3(2a - 6) + 4(2 - 5a) = 18
6a - 18 + 8 - 20a = 18
-14a - 10 = 18
-14a = 28
a = -2
(c) Factorise completely: 15p^2q - 30pq^2
= 15pq(p - 2q)
Simplify : 2t - 5m - 7t + 9m.
( 2 )
( b ) Solve the equation : 3(2a - 6) + 4(2 – 5a) = 18
( 3 )
( c ) Factorise completely : 15 p²q - 30pq²
1 answer