Решите уравнение: 1) 12[tex] x^{2} [/tex]-(3х-4)(4х+1)=19. 2) (3х+5)(2х+1)=(6х+5)(х-3)+7.
Разложите на множители: 1) 8хy-4y+2[tex] x^{2} [/tex]-x. 2) 3[tex] x^{3} [/tex]-5[tex] x^{2} [/tex]y-9x+15y.
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