1)
12х+24=96
12х=96-24
12х=72
х=72/12
х=6
2)
(4x-1)(4x+1)-(8x-1)(2x+1)=0
16х²-1-(16х²+8х-2х-1)=0
16х²-1-16х²-6х+1=0
-6х=0
х=0
3)
x²+6x=-9
x²+6x+9=0
D=36-36=0
х=(-6)/2=-3
4)
(x+4)(x+3)=18
х²+3х+4х+12-18=0
х²+7х-6=0
D=49+24=73
x₁=(-7+√73)/2
x₂=(-7-√73)/2
1)
12х+24=96
12х=96-24
12х=72
х=72/12
х=6
2)
(4x-1)(4x+1)-(8x-1)(2x+1)=0
16х²-1-(16х²+8х-2х-1)=0
16х²-1-16х²-6х+1=0
-6х=0
х=0
3)
x²+6x=-9
x²+6x+9=0
D=36-36=0
х=(-6)/2=-3
4)
(x+4)(x+3)=18
х²+3х+4х+12-18=0
х²+7х-6=0
D=49+24=73
x₁=(-7+√73)/2
x₂=(-7-√73)/2