Question

Solve the following​

Answer 1

Answer:

{A ans- 8x-6y-6z^2}

{B ans- 6p^2-5pq-2q^2

Step-by-step explanation:

(A)= 2x+3y+6z^2+6x-9y-12z^2

=2x+6x+3y-9y+6z^2-12z^2

=8x-6y-6z^2....done√

(B)= 9p^2-pq+7q^2-4pq-5q^2-3p^2

= 9p^2-3p^2-pq-4pq+7q^2-5q^2

= 6p^2-5pq-2q^2

Answer 2

Solution given below.

Step-by-step explanation:

a)   $2x + 3y + 6z^{2}$

+  $6x - 9y - 12z^{2}$

------------------------

   8x  - 6y  - 6$z^{2}$

b) $9p^{2} -pq +7q^{2}$

- (  $-3p^{2} + 4pq - 5q^{2} \\--------$)  

   $9p^{2} +3p^{2}$-pq-4pq $+7q^{2} +5q^{2}$

= $12p^{2} -5pq+12q^{2}$