Just remember that in the form of 
, you get 
.
Answer:
I think the second one is the answer ; 2√b
Download photo math for equations like this, it will also give you it step by step :)
U=(x+2)
u^2+5u-6=0
C is answer
Answer:
The yellow polygon is the scaled version of the red one (scaled by 3×), so the variable w = 9
