well, is noteworthy that an x-intercept is when y = 0 or namely is a solution or root of the quadratic, so we know then that the x-intercepts or solutions are at (-1,0) and (3,0), that simply means that

![\bf -8=a(2)(-2)\implies -8=-4a\implies \cfrac{-8}{-4}=a\implies \boxed{2=a} \\\\[-0.35em] ~\dotfill\\\\ y=2(x+1)(x-3)\implies y=2(\stackrel{\mathbb{FOIL}}{x^2-2x-3})\implies y=2x^2-4x-6](https://tex.z-dn.net/?f=%5Cbf%20-8%3Da%282%29%28-2%29%5Cimplies%20-8%3D-4a%5Cimplies%20%5Ccfrac%7B-8%7D%7B-4%7D%3Da%5Cimplies%20%5Cboxed%7B2%3Da%7D%20%5C%5C%5C%5C%5B-0.35em%5D%20~%5Cdotfill%5C%5C%5C%5C%20y%3D2%28x%2B1%29%28x-3%29%5Cimplies%20y%3D2%28%5Cstackrel%7B%5Cmathbb%7BFOIL%7D%7D%7Bx%5E2-2x-3%7D%29%5Cimplies%20y%3D2x%5E2-4x-6)
The equation of line in point-slope form of the line that passes through the point (−1, −3) and has a slope of 4 is:
y+3=4(x+1)
Step-by-step explanation:
Given
m=4
and
Point = (x1,y1) = (-1,-3)
The general form of point-slope equation of line is:

Hence,
The equation of line in point-slope form of the line that passes through the point (−1, −3) and has a slope of 4 is:
y+3=4(x+1)
Keywords: Point-slope form, Slope
Learn more about equation of line at:
#LearnwithBrainly
FIND LOT AREA:
Area = length * width
A= 18 feet * 45 feet
A= 810 feet squared
FIND # OF YARDS:
1 yard= 3 feet
Divide number of square feet by number of feet per yard.
Yards= 810 ÷ 3
Yards= 270
FIND PRICE OF SOD:
multiply number of yards by price per square yard.
Price= 270 yards * $12/yard
Price= $3,240
ANSWER: Cindy will pay $3,240 to cover the lot with sod.
Hope this helps! :)
F(x) = x4(x2 - 1)
f(-x) = (-x)4((-x)2 - 1)
f(-x) = x4(x2 - 1)
from above explanation it is clear that the function is even.