Ur answer is 27
do u get it?
Answer is 1/2 ln (x^2+1) + 2 tan ^-1 (x) +c
in order to do this first say (x/x^2+1)+ 2/(x^2+1)
we already know that 1/x^2+1 equal tan^-1 (x)
for the first part you need to say u=x^2+1 and solve it by substitution
I hope this helps..let me know if you need more explanation
Answer:7/1000
Step-by-step explanation:
<span>3x + 3y = –9
3x – 3y = 21
-----------------add
6x = 12
x = 2
</span>3x + 3y = –9
3(2) + 3y = -9
6 + 3y = -9
3y = -15
y = -5
x = 2 and y = -5
answer: <span>C. (2, –5)</span>