Question 81 (vi)

Add:

3a(a - b + c) , 2b(a - b + c)

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Solution

3a(a - b + c) + 2b(a - b + c)

= $3 a^{2} - 3 a b + 3 a c + 2 a b - 2 b^{2} + 2 b c$

= $3 a^{2} - 2 b^{2} - a b + 2 b c + 3 a c$

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3 a (a - b + c), 2 b (a - b + c)

Question 81 (vi)

Add:

3a(a - b + c) , 2b(a - b + c)

Question 5(d)
Substract: $3 a (a + b + c) - 2 b (a - b + c) f r o m 4 c (- a + b + c) .$

Question 5(d)
Substract: $3 a (a + b + c) - 2 b (a - b + c) f r o m 4 c (- a + b + c) .$

3 a (a + b + c) - 2 b (a - b + c)

4 c (- a + b + c)

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