Question

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Solve with the whole method
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Answer 1

Answer:

Add:

1. = -3x²-9y²+7z²

2.= 2x+4y+3z

Subtract:

7x²-5x-1

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Answer 2

Q.1 add

1.2x²-3y²+5z², -7y²-5x²+z², y² + z²

= (2x²- 3y² +5z²) + ( -7y²-5x²+z²) + ( y²+z²)

=7x²+ 11y²+7z²

2. -3x + 2y, -2y + 3z, 5x +5y

=(-3x + 2y ) + (-2y + 3z ) + ( 5x + 5y )

= 2x + 4y + 3z

Q.2 subtract

3x²+ 2x - 4 from 4x² - 3x -5

= ( 4x² - 3x -5) - (3x² + 2x -4)

= x²- x -9