Question

2. Subtract the following:
(a) 5xy from 11xy
(b) a² - 3ab from 2a²- 7ab
(c) -12a²b from 9a²b
(d) a³+b³- 3ab from a³-b³-3ab​

Answer 1

Step-by-step explanation:

(a) 11xy- 5xy= 6xy

(b) 2a²-7ab-(a²-3ab)= 2a²-7ab-a²+3ab= a²-4ab

(c) 9a²b-(-12a²b)= 9a²b+12a²b= 21a²b

(d)a³-b³-3ab-(a³+b³-3ab)= a³-b³-3ab-a³-b³+3ab= -2b³

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Answer 2

Step-by-step explanation:

a) 5xy from 11xy

=11xy-5xy

=6xy

b)a²-3ab from 2a²-7ab

=2a²-7ab-a²-3ab

=2a²-a²-7ab-3ab

=a²-10ab

c) -12a²b from 9 a²b

=9a²b-(-12a²b)

=9a²b+12a²b

=21a²b

d) a³+b³-3ab from a³-b³-3ab

=a³-b³-3ab-a³+b³-3ab

=a³-a³-b³+b³-3ab-3ab

=-9ab