The remainder when $3 x^{2} + 5 x - 7$ is divided by $x + 3$ is

- 5

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4

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2

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5

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Solution

The correct option is D $5$
Using the remainder theorem, we know that to find the remainder we need to just substitute for $x + 3 = 0$ , i.e $x = - 3$ in the equation $3 x^{2} + 5 x - 7$
= $3 \times (- 3)^{2} + 5 \times (- 3) - 7$
= $3 \times 9 - 15 - 7$
= $27 - 22$
= $5$

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