Help with math problems

i have 3 math problems but i don't understand how to solve them

1.) solve by factoring, 4x^2-x-3=0

2.) simplify, x^2-4/x^2-3x+2

3.)simplify, c^2/de * 7d^4e/4c

please explain how to do each problem with details, thank you...

1. 4x^2 - x - 3 = 0
(4x + 3)(x - 1) = 0
x = -3/4, 1

2. (x^2 - 4)/(x^2 - 3x + 2)
(x + 2)(x - 2)/(x - 2)(x - 1)
(x + 2)/(x - 1)

3. c^2/de * 7d^4e/4c
c(7d^3/4)
7cd^3/4

4x^2-x-3=0
(4x+3)(x-1)=0

4x+3=0
4x = -3
x = -3/4

x-1=0
x = 1


x^2-4/x^2-3x+2
[(x-2)(x+2)]/[(x-2)(x-1)]
= (x+2)/(x-1)


c^2/de * 7d^4e/4c
c * 7d³/4
= 7cd³/4