Use the discriminant of the following quadratic equation to state the number and type of solutions x^2+4x=2x-7 a) 1 real solution b) 2 complex solutions c) 2 real solutions d) 1 complex solution

 Option b

Given a quadratic equation of the form

Let us write this in standard form of the type

Now this equation is in std form with a =1,b=2 and c =7

Discriminant =

Since discriminant is negative we find that there are two distinct complex solutions for this quadratic equation.

So Option b is right.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

its adding 5.5 each time

step-by-step explanation: