Решите уравнение
2) (х-3)(х2+3х+9)-х(х2-16)=21
4) 16х(4х2-5)+17=(4х+1)(16х2-4х+1)

2) (х-3)(х2+3х+9)-х(х2-16)=21x³-3³-(x³-16x)=21x³-27-x³+16x=2116x=21+2716x=48x=48:16x=34) 16х(4х2-5)+17=(4х+1)(16х2-4х+1)16*4*x³-5*16x+17=(4x)³+164x³-80x+17=64x³+180x=64x³-64x³+17-180x=16x=16:80x=1/5=0.2