Solving the quadratic equations using "factoring" techniques.

1. 30x²+26x-12=0.

2. -4x²-11x= -3.

3. 6x²+5x=6.

4. 25x²+1=10x

5. 2x²=15+7x..

Solve the quadratic equations by using the "perfect square" technique:

1. (4x+1)²=3.
2. (2x-1)²=3.
3. (4x+1)²= -3.
4. (3x-1)²=7.
5. (-4x-1)²=3.