(will get brainliest) simplify the expression: left square bracket left parenthesis 18 − 6 right parenthesis ⋅ 3 plus 1 right square bracket ⋅ 7
a.
43
b.
259
c.
7
d.
336

B. 259

Step-by-step explanation:

This is an exercise in PEMDAS, the order of mathematical operations:

Parentheses, Exponents, Multiplication and Division, Addition and Subtraction

Parentheses:          [(18 − 6)⋅3 + 1]⋅7

       Subtraction: = [(12)·3 +1]·7

    Multiplication: = [36 + 1]·7

            Addition: = [37]·7

Parentheses:       = 37·7

    Multiplication: = 259

The intercepts of the third degree polynomial corresponds to the zeros of the equation
y = d*(x-a)*(x-b)(x-c)
Where a, b and c are the roots of the polynomial and d an adjustment coefficient.
y = d*(x+2)*(x)*(x-3)
Lets assume d = 1, and we get
y = (x+2)*(x)*(x-3) = x^3 - x^2 - 6x
We graph the equation in the attached file.