Question

if -1 is the root of x²+ px² -x +2 then the value of p is?​

Answer 1

Answer: p= -4

Step-by-step explanation:

q(-1)=0

(-1)^2 + p(-1)^2 - (-1) +2=0

1+p+1+2=0

p+4=0

p= -4!!!!!!!!!!!

Answer 2

x = -1 ( given) root means value

So, x² + px² - x + 2 =0

• (-1)²+p(-1)²-(-1)+2 =0

• 1 + p + 1 + 2 =0

• 2 + 2 + p =0

• 4 + p =0

• p = -4