5x²+10x-x-2+18x-52=4x²+24x+18-8
5x²+27x-4x²-24x=10+54
x²+3x=64
x(x+3)=64
x=64 x+3=64
x=61
5x²+10x-x-2+3(2x+4x-8-16)=2(4x²+9+12x)-8
5x²+9x-3+6x+12x-24-48=8x²+18+24x-8
5x²+27x-72-8x²-18+24x+8=0
-3x²+51x-64=0
D=b²-4ac= 2601-4(-3)(-61)=1869
x1= (-51+√1869)/-9
x2= (-51-√1869)/-9
