1)-5x²-30x = 4x-12-10
5x²+34x-22 = 0
3)3x²+9x-9x-27 = x²+x-72
2x²-x+45 = 0
2)2x²+3x-16x-24 = 3x²+12x-5x-20
x²+20x+4 = 0
4)7y²-343 = y²+y-56
6y²-y-287 = 0
