If x = -3, what is the value of 2(x – 4) – x2

=−x2+2x−8

Step-by-step explanation:

2(x−4)−x2

Distribute:

=(2)(x)+(2)(−4)+−x2

=2x+−8+−x2

=−x2+2x−8

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

c. side angle side. u shares the same sides