Subtract the first term from second term.
i) $2 x y, 7 x y$
ii) $5 a^{2}, 10 a^{2}$
iii) $6 x^{2} y, 4 x^{2} y$
iv) $6 x y, - 12 x y$

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Solution

$i) 7 x y - 2 x y = 5 x y$
$i i) 10 a^{2} - 5 a^{2} = 5 a^{2}$
$i i i) 4 x^{2} y - 6 x^{2} y = - 2 x^{2} y$
$i v) - 12 x y - 6 x y = - 18 x y$

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Question 3 (ii)

Subtract:

$6 x y f r o m - 12 x y$

3 x^{2} y - 5 x y^{2} - 6 x y

- 7 x y^{2} + 4 x^{2} y

- 5 x y - 6 x^{2} y + 7 y^{2} x

If we subtract $- 4 x^{2} y$ from $2 x^{2} y$ we get:

2 x y + 9 x^{2}

12 x y + 4 x^{2} - 3 y^{2}

25 - 4 x^{2} - 12 x y - 9 y^{2}

x^{2} - a^{2} + 10 a b - 25 b^{2}

6 x y + x^{2} + 9 y^{2} - 4 a^{2}

9 x^{2} + 4 + 12 x - a^{2} + 2 a b - b^{2}

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