Question

(1) Check whether x = -3 is a root of the quadratic equation
x² + 4 = 13.​

Answer 1

Answer:

Yes it's a quadratic equation

Answer 2

Answer:

x = -3 is a root of the quadratic equation

Step-by-step explanation:

${x}^{2} + 4 = 13 \\ substitute \: x = - 3 \\ {( - 3)}^{2} + 4 = 13 \\ 9 + 4 = 13 \\ 13 = 13 = 0$