Question

is -3 a zero of the polynomial X square + X - 5

Answer 1

Hey,

$f(x) = x {}^{2} + x - 5 \\ \\ given \: x = - 3 \\ \\ f( - 3) = ( - 3) {}^{2} - 3 - 5 = 9 - 8 = 1$

Hence,x=3 isn't a value of given polynomial

Answer 2

I think u understood this.

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