9y^2+30y=-25
5x^2+2=-7x
x-20x
2v^2=-9v-4
(1/2m²n-2m)²
ñ1²
1 $frc{Bo}{Bo}$
-2(u+1)(-u+9)=0
1- csc (a)^(2)
1- csc (a)^(2)= cot (a)^(2)
(5v+7)(4-v)=0
-5u(u-7)(u+1)=0
