Question

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Answer 1

Answer:

9x - 10y + 6z²

Step-by-step explanation:

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Answer 2

GiveN:-

• 4x + 3y - z²
• -4x + 2y - 3z²
• 3x - 4y - 5z²
• -3x - y + 5z²

To FinD:-

Their difference.

SolutioN:-

First the sum:-

4x + 3y - z² + (-4x + 2y - 3z²)

= 4x + 3y - z² - 4x + 2y - 3z²

= 3y - z² + 2y - 3z²

= 5y - 4z²

_____________________________

3x - 4y - 5z² + (-3x - y + 5z²)

= 3x - 4y - 5z² + (-3x - y + 5z²)

= 3x - 4y - 5z² - 3x - y + 5z²

= - 4y - y

= -5y

_____________________________

Now we have to subtract 5y - 4z² from -5y

So,

= - 5y - (5y - 4z²)

= - 5y - 5y + 4z²

= -10y + 4z²

So, the answer is -10y + 4z².