Question

Is x=-3 zero of the polynomial p(x)=2x^2+5x+3​

Answer 1

Answer:

2x^2 + 5x + 3

2(-3)^2 + 5(-3) + 3

18-15+3

21-15

6

therefore x=-3 is not the zero of the given polynomial.

Answer 2

$\mathfrak{\red{SOLUTION:-}} \\ \\ </p><p></p><p></p><p></p><p></p><p> \tt p(x) = {2x}^{2} + 5x + 3 \\ \\ \tt \red {\:put \: x \: = \: - 3} \\ \\ \tt \therefore \: p(x) = 2( - 3)^{2} + 5( - 3) + 3 \\ \\ \tt \: \: = 2(9) - 15 + 3 \\ \\ \tt \: \: = 18 - 12 \\ \\ \tt \therefore \: p(x) = 6 \\ \\ \texttt{</p><p>x = -3 is not zeros of given polynomial.}$

• Reason

p(x) should be equal to 0.

p(x) = 0.