Question

Is x=-2, a zero of the polynomial x³-2x+8 ? true or false

Answer 1

Answer:

false

Step-by-step explanation:

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Answer 2

Answer:

false

Step-by-step explanation:

$Given \ polynomial, \\ p(x)=x^3-2x+8 \\\\ => if \ x=-2 \ is \ a \ zero \ of \ the \ polynomial,then \ p(-2)=0 \\\\ put \ x=-2, \\\\ =>(-2)^3-2(-2)+8 \\ =>-8+4+8 \\ =>4 \ne 0 \\\\ not \ a \ zero$