Add:5x2 – 3xy + 4y2 – 9, 7y2 + 5xy – 2x2 + 13

: The addition is as follows:The result is as follows 7x2 + 2xy + 11y2 + 4

Q81 of 128 Page 224

Add:
5x² – 3xy + 4y² – 9, 7y² + 5xy – 2x² + 13

: The addition is as follows:

The result is as follows 7x² + 2xy + 11y² + 4

Add:

9ax, + 3by – cz, -5by + ax + 3cz

Add:

xy²z² + 3x²y²z–4x²yz²,-9x²y²z + 3xy²z² + x²yz²

Add:

2p⁴ – 3p³ + p² – 5p + 7, -3p⁴-7p³-3p²-p-12

Add:

3a(a-b-c), 2b (a-b + c)