Answer:
9x squared + 12x
Step-by-step explanation:
1. b=39.497
2. c=3.606
3. a=18.974
1.
41^2-11^2=b^2
1681-121=b^2
b^=1560
b=39.497
2.
2^2+3^2=c^2
4+9=c^2
c^2=13
c=3.606
3.
21^2-9^9=a^2
441-81=a^2
a^2=360
a=18.974
true
c/8
