Add: $3 a - 2 b, 10 a - 4 b, - 2 a + 5 b$

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Solution

Given, $3 a - 2 b + 10 a - 4 b + (- 2 a + 5 b)$

$= (13 a - 6 b) + (- 2 a + 5 b)$

$= 13 a - 6 b - 2 a + 5 b$

$= 11 a - b$

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$3 a - 2 b + 5 c, 2 a + 5 b - 7 c, - a - b + c$

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(i) $(2 a - 5 b - 7 c)^{2}$ (ii) $(- 3 a + 4 b - 5 c)^{2}$ (iii) $(\frac{1}{2} a - \frac{1}{4} b + 2)^{2}$

{(\frac{1}{2} a - \frac{1}{4} a + 2)}^{2}

Question 81 (vii)

Add :

$3 a (2 b + 5 c), 3 c (2 a + 2 b)$

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