Simplify the algebraic expression: x(x + 3) + x(2x – 4) + 6
a. 3x2 + 5
b. 2x4 – x2 + 6
c. 3x2 + x + 6
d. 3x2 – x + 6
will mark for brainlest if answered correctly.

whats the

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)