Algebra l Help please

I suck at Algebra could anyone please help me solve these few problems? Thanks!

A) 18n^2 + 60n + 50 =0

B) 4x^2 = 9/16

C) -4y^2 + 32y - 64 =0

Thank you so much

A) 18n² + 60n + 50 =0
2 ( 9n² + 30n + 25) = 0
2( 3n +5 ) ( 3n + 5) =0
2( 3n +5 )² = 0

3n + 5 = 0
3n = -5
n= -5/3


B) 4x² = 9/16
x²= 9/64
x = √ 9/64
x= ± 3/8


C) -4y² + 32y - 64 = 0
- 4 (y² - 8y + 16) = 0
- 4( y - 4) ( y - 4) = 0
- 4( y - 4)² = 0

y - 4 = 0
y= 4

A)
18n^2 + 60n + 50 = 0
9n^2 + 30n + 25 = 0
(3n + 5)^2 = 0
Solution:
n = -5/3

B)
4x^2 = 9/16
x^2 = 9/64
Solutions:
x = +/- (3/8)

C)
-4y^2 + 32y - 64 = 0
y^2 - 8y + 16 = 0
(y - 4)^2 = 0
Solution:
y = 4