СРОЧНО,ПОЖАЛУЙСТА ПОМОГИТЕ!!!. Created by daschaleurda20. algebra-ru

СРОЧНО,ПОЖАЛУЙСТА ПОМОГИТЕ!!!...

November 2021 1 11 Report

СРОЧНО,ПОЖАЛУЙСТА ПОМОГИТЕ!!!

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lakOR555 А)х²-8х+16=х+8
х²-9х+8=0
д=81-32=49, √49=7
х1=9-7/2=1
х2=9+7/2=8

б)х²-36=2х-1
х²-2х-35=0
д=4+140=144, √144=12
х1=2-12/2=-5
х2=14/2=7

в)х-2+2√х+6=16
2√х+6=16-х+2
2√х+6=18-х
4(х+6)=324-36х+х²
4х+24=324-36х+х²
-х²+40х-300=0
д=1600-1200=400 √400=20
х1=-40-20/-2=-60/-2=30
х2=-20/-2=10

г)х+4=(2+√6-х)²
х=4√6-х+6-х
-4√6-х=6-х-х
-4√6-х=6-2х
-2√6-х=3-х
4(6-х)=9-6х+х²
24-4х-9+6х-х²=0
-х²+2х+15=0
4+60=64=8
х1=-2-8/-2=5
х2=-3

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