3x + m = 0
3x = - m
x= - m/3
х^3 - 3х^2 - 4х + 12 = 0
(x^3-3x^2)+(-4x+12)=0
x^2(x-3)-4(x-3)=0
(x^2-4)(x-3)=0
<span>x^2=4 или<span> x=3</span></span>
<span>x=±2</span>
<span>Ответ: -2; 2; 3.</span>
1)0,15*348,4+151,6*0,15=0,15*(348,4+151,6)=0,15*500=75
2)Х=(38,5+12,36):2=25,43
У=3*(24,39-16,2)=24,57
Х+у=25,43+24,57=50