Identify the vertex and the y-intercept of the graph of the function y=-(x+3) +4.

vertex: (-3, 4); y-intercept: -5
vertex: (3,-4); y-intercept: -9
vertex: (3, 4); y-intercept: -5
vertex: (-3,-4); y-intercept: 13

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step-by-step explanation:

the one below it is a function

true

step-by-step explanation:

it is more then likely a review to you prepare for an upcomign test or quiz

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81