(4x2−2x+28)+(4x2+4x−55)

Step-by-step explanation:

When there is a ( + ) in front of an parentheses in an expression, there is no need to change the sign of each term in the expression. That means , the expression remains the same. Just, remove the unnecessary parentheses

Collect like terms and simplify

The negative and positive integers are always subtracted but possess the sign of the bigger integer.

Hope I helped!

Best regards! :D

answer: im sorry i dont get it

step-by-step explanation:

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)