Решите уравнения(№134). Created by djthefox. algebra-ru

Решите уравнения(№134)...

djthefox @djthefox

August 2022 1 8 Report

Решите уравнения(№134)

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гюйс

Verified answer

2х(5х-7)=2х²-5
10х² -14х -2х²+5=0
8х² -14х+5=0
D/4=7²-8*5=9 (±3²)
х1=(7+3)/8=5/4=1 1/4=1,25
х2=(7-3)8=1/2=0,5

(х-5)²=3х² -х+14
х²-10х+25=3х²-х+14
2х²+9х-11=0
D=9²+4*2*11=169 (±13²)
х1=(9-13)/4= - 1
х2=(9+13)/4=5,5

1,3х+0,2=0,7х²
0,7х² -1,3х-0,2=0
D=1,3²+4*0,7*0,2=2,25 (±1,5²)
х1=(1,3+1,5)/1,4=2
х2=(1,3-1,5)/1,4= -1/7

9х²+2х-1/3=0
27х² +6х -1=0
D/4=3²+27=36 (±6²)
х1=( -3+6)/27=1/9
х2=( -3-6)/27= - 1/3

(3х-1)(х+2)=20
3х²+5х-2-20=0
3х²+5х-22=0
D=5²+4*3*22=289 (±17²)
х1=(-5-17)/6= - 11/3= - 3 2/3
х2=( -5+17)/6=0,5

(х+4)²=4х²+5
х²+8х+16-4х²-5=0
- 3х²+8х+16=0
D/4=4²+3*16=64 (±8)
х1=( -4+8)/(-3)= -1 1/3
х2=(-4-8)/(-3)=4

9х(4х-1)=3х-1
36х² -9х-3х+1=0
36х² -12х+1=0
D/4=6²-36=0
х=6/36=1/6

0,09-4х²=1,6х
4х²+1,6х-0,09=0
D/4=0,8²+4*0,09=1
х1=(-0,8-1)/4= - 0,45
х2=(-0,8+1)/4=0,05

0,1х² -14=-0,4х
0,1х²+0,4х-14=0
D/2=0,2²+0,1*14=1,44 (±1,2²)
х1=(-0,2-1,2)/0,1= -14
х2=(-0,2+1,2)/0,1=10

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