Question

1. Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y , –3xz + 5x – 2xy.
2. Subtract 5x2 – 4y2 + 6y – 3 from 7x2 – 4xy + 8y2 + 5x – 3y.
3. Subtract 4a – 7ab + 3b + 12 from 12a – 9ab + 5b – 3
4. Subtract 3xy + 5yz – 7zx from 5xy – 2yz – 2zx + 10xyz
5. Subtract 4p2q – 3pq + 5pq2 – 8p + 7q – 10 from 18 – 3p – 11q + 5pq – 2pq2 + 5p2q

Answer 1

Answer:

1)5x+5xy-4y+3xz+9yz

2)5x-4xy+15y+7

3)-8a+2ab-2b+15

4)2xy-7yz+5xz+10xyz

5)5p-4pq-18q+28

Step-by-step explanation:

1)(7xy+5yz-3zx)+(4yz+9zx-4y)+(-3xz+5x-2xy)-

⇒7xy+5yz-3zx+4yz+9zx-4y-3xz+5x-2xy

⇒5x+5xy-4y+3xz+9yz

2)(7x2 – 4xy + 8y2 + 5x – 3y)-(5x2 – 4y2 + 6y – 3)

⇒7x2 – 4xy + 8y2 + 5x – 3y-5x2 + 4y2 - 6y + 3

⇒14 – 4xy + 16y + 5x – 3y- 10 + 8y - 6y + 3

⇒5x-4xy+15y+7

3)(4a – 7ab + 3b + 12)-( 12a – 9ab + 5b – 3)

⇒4a – 7ab + 3b + 12- 12a + 9ab - 5b + 3

⇒-8a+2ab-2b+15

4)(5xy – 2yz – 2zx + 10xyz)-(3xy + 5yz – 7zx)

⇒5xy – 2yz – 2zx + 10xyz-3xy - 5yz + 7zx

⇒2xy-7yz+5xz+10xyz

5)(18 – 3p – 11q + 5pq – 2pq2 + 5p2q)-(4p2q – 3pq + 5pq2 – 8p + 7q – 10)

⇒18 – 3p – 11q + 5pq – 2pq2 + 5p2q-4p2q + 3pq - 5pq2 + 8p - 7q + 10

⇒18 – 3p – 11q + 5pq – 4pq + 10pq-8pq + 3pq - 10pq + 8p - 7q + 10

⇒5p-4pq-18q+28

I hope this will be helpful to you

mark me as brainliest

Answer 2

Answer:

ok

Step-by-step explanation: