Question

check whether x= -2 is a zero of the of the polynomial 3x^2 - 2x +6​

Answer 1

Answer:

$f( - 2) = 3 \times {( - 2)}^{2} - 2 \times ( - 2) + 6 \\ = 3 \times 4 + 4 + 6 = 12 + 4 + 6 = 22$

Sine f(-2) is not equal to 0 -2 is not a zero of the polynomial.