Evaluate:
(iv) $(9 a - 3 a) + 4 a$ .

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Solution

$(9 a - 3 a) + 4 a = 6 a + 4 a$

[On removing the small brackets ]

$= 10 a$

Hence, $(9 a - 3 a) + 4 a = 10 a$ .

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Solve the following

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(2)

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(4)

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3 a^{2} (2 a^{2} - 3) + 4 a (4 a^{3} + 3) - 12 (a + 1)

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