(3х+2)(4х-1)-12=х (10+10х)

Question

(3х+2)(4х-1)-12=х (10+10х)

Answer 1

12x^2 + 5x - 14 = 10x + 10x^2
12x^2 - 10x^2 + 5x - 10x - 14 = 0
2x^2 - 5x - 14 = 0 
D = 25 + 8*14 = 137
x1 = ( 5 + √137)/4
x2 = (5 - √137)/4

Comments

2y(3y-4)+24y=(7y-3)(2+y)

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это Вкратце, формула умножения