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Q. Simplify the following expressions by adding or subtracting like terms.
F) $3 x^{2} + 7 x - 12 + 5 x^{2}$

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Solution

$3 x^{2} + 7 x - 12 + 5 x^{2} = (3 x^{2} + 5 x^{2}) + 7 x - 12 = 8 x^{2} + 7 x - 12$

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