Question

is x+3 a factour of 2xcube +3x=5​

Answer 1

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ANSWER ⭐✔️

$x + 3 = 0 \\ x = -3 \\ \\ \\ p(x) = 2 {x}^{3} + 3x = 5 \\ p( - 3) = 2( - 3)^{3} - 5 = 0 \\ \\ p( - 3) \: = \: 2 \times ( - 27) - 5 = 0 \\ p( - 3) \: = - 54 - 5 = - 59 \\ \\ \\ when \: putting \: the \: value \: of \: x \: in \: p(x) \\ we \: do \: not \: get \: zero \\ \\ hence \: (x + 3) \: is \: not \: a \: factor \: of \: p(x)$

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