Question

subtract the following​

Answer 1

iii)

$\frac{3}{7} {x}^{2} {y}^{2} - (\frac{ - 2}{ \ \: \: 5}{x}^{2}{y}^{2})$

$\frac{3}{7} {x}^{2} {y}^{2} - \frac{ 2}{ 5}{x}^{2}{y}^{2}$

$\frac{3}{7} - \frac{2}{5}$

LCM of 7 and 5 = 35

$\frac{3}{7} = \frac{15}{35} and \frac{2}{5} = \frac{14}{35}$

$\frac{15}{35} - \frac{14}{35} = \frac{15 - 14}{35} = \frac{1}{35}$

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iv)

2a-2y+4z - (a+6y-8z)

2a-2y+4z-a-6y+8z

(2a-a) - (2y+6y) + (4z+8z)

1a +4y + 12z

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v)

7x²-4x+7 - (x²+2x-3)

7x²-4x+7-x²-2x+3

(7x²-x²) - (4x-2x) + (7+3)

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vi)

4x²-3xy+5y² - (x² + 2xy + y²)

4x²-3xy+5y²-x²-2xy-y²

(4x²-x²) - (3xy-2xy) + (5y²-y²)

3x²-5xy+4y²

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vii)

4x+2y-6z - (2x-y+4z)

4x+2y-6z-2x+y-4z

(4x-2x) + (2y+y) - (6z-4z)

2x+3y-10z

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I hope this helped, Ya know.

And, thankyou for marking me the Brainliest.