Question

Find the sum of the following.

a) 3a + 4b – 7d, a – 7c + d, 2b – 5c

b) x3+ 7x2y – 11xy2 + 16, -3x3 – 8x2y + 20xy2+ 4​

Answer 1

Answer:

3a+4b+7c,−5a+3b−6c and 4a−2b−4c

The sum of 3a+4b+7c,−5a+3b−6c and 4a−2b−4c is calculated as shown below

(3a+4b+7c)+(−5a+3b−6c)+(4a−2b−4c)

=3a+4a−5a+4b+3b−2b+7c−6c−4c

We get,

=2a+5b−3c

Hence, the sum of 3a+4b+7c,−5a+3b−6c and 4a−2b−4c is 3c

Step-by-step explanation:

hope it help