X|-2|0|0|0,5|-0,5|2|
y|-8|0|0|2|||||-2||||8|
1) y= 4*(-2)
y= -8
2)0=4x
x=0
3)y= 4*0
y=0
4) y=4*0,5
y=2
5)-2= 4x
x=-0,5
6)y=4*2
y=8
(х-4)³ - х(х² + 39) = - 54 - 10х²
х³ - 3·х²·4 + 3·х·4² - 4³ - х³ - 39х = - 54 - 10х²
- 12х² + 48х - 64 - 39х + 54 + 10х² = 0
- 2х² + 9х - 10 = 0
2х² - 9х + 10 = 0
D = b² - 4ac
D = 81 - 4·2·10 = 81 - 80 = 1
√D = √1 = 1
x₁ =(9 - 1)/4 = 2
x₂ = (9 + 1)/4 = 10/4 = 2,5
4*(х + 14) - 3*(х - 12) = 72
4х + 56 - 3х + 36 = 72
х = 72-56-36
х = -20
(15mn-3n)+(15m2-m)=3n(15m-1)+m(15m-1)=(15m-1)(3n+m)