Answer:
Step-by-step explanation:
x²+4xy+4y²-8x-16y-20=(x+2y)²-8(x+2y)-20
put x+y=t
t²-8t-20=t²-10t+2t-20=t(t-10)+2(t-10)=(t-10)(t+2)
substitute the value of t
x²-4xy+4y²-8x-16y-20=(x+2y-10)(x+2y+2)
i don't know what else you want.
Answer:
The answer is 3,052.22
Step-by-step explanation:
Answer:
. The inverse function is y=x−24 .
Step-by-step explanation:
Step-by-step explanation:
y=2x+9
y=6−x
(y-2x=9)(-1)
y+x=6
-y+2x=-9
y+x=6
3x=-3
x=-3/3=-1
sub x=-1 in eq 1
y-2(-1)=9
y+2=9
y=9-2=5
so (-1;5) is the only solution for this system
(hope it's correct)
A = .5 r^2 theta
Theta must be in radians
A = .5 (15.7)^2 (102)(pi/180)
A= 219 mm^2