Question

check whether -3 is a root of x^2+6x+9=0​

Answer 1

Answer:

yes it is..

Step-by-step explanation:

x2+6x+9..

by Quadratic formula.

-b+_root b2-4ac/ 2a

Answer 2

To check whether -3 is a root of the equation or not we just have to put -3 in the equation. if after simplification we get zero ( 0 ) then it is a solution of the equation.

${x}^{2} + 6x + 9 = 0$

${ - 3}^{2} + 6 \times ( - 3) + 9 = 0$

$9 - 18 + 9 = 0$

$18 - 18 = 0$

$0 = 0$

hence the result is zero after simplification of the polynomial. therefore -3 is the root of the equation.