Question

x²+2x-9=0 for this equation the value of triangle is ?​

Answer 1

Step-by-step explanation:

A=1. B=2 c= -9

maybe use Pythagoras therme

Answer 2

x2 - 2x + 9 = 0

a=1, b=-2, c=9.

D=b2-4ac=(-2)2-4*9=4(1-9)=4*(-8)=-32<=0

Equation has no real roots. 

There are two complex roots: x1=1- i2 √, x2=1+i2√ 2, which are conjugate to each other.