Simplify combining like terms:
$(3 y^{2} + 5 y - 4) - (8 y - y^{2} - 4)$

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Solution

$3 y^{2} + 5 y - 4 - (8 y - y^{2} - 4)$
$\Rightarrow 3 y^{2} + 5 y - 4 - 8 y + y^{2} + 4$
$\Rightarrow 3 y^{2} + y^{2} + 5 y - 8 y - 4 + 4$
$\Rightarrow 4 y^{2} - 3 y$
$\Rightarrow y [4 y - 3]$

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Question 1 (vi)

Simplify combining like terms:

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