Question

determine whether x= -1 is a root of the equation x² -3x +2=0 or not​

Answer 1

$\sf\green{Answer}$

$\sf p(x)=x²-3x+2$

$\sf p(-1)=(-1)²-3(-1)+2$

$\sf 1-3+2=0$

$\sf 3-3=0$

$\sf 0=0$

$\sf\red{ x=-1 \:\: is \:\: a \:\: root \:\: of \:\: the \:\: equation}$