" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
każdy nawias trzeba przyrównać do zera:
5x-3=0
5x=3 /:5
x=3/5
2x+1=0
2x=-1 /:2
x=-1/2
x-2=0
x=2
b) (x-√2)(7x-1)(5-x)=0
x-√2=0
x=√2
7x-1=0
7x=1 /:7
x=1/7
5-x=0
-x=-5 /:(-1)
x=5
c) x(4x+7)(x²-4)=0
x=0
4x+7=0
4x=-7 /:4
x=-1,75
x²-4=0
x²=4 /*√
x=2
d) 5x²(x²-6x+5)(6-5x)=0
5x²=0 /:5
x²=0 /*√
x=0
x²-6x+5=0
Δ=(-6)-4*1*5=36-20=16
√Δ=4
x1=6-4 / 2 = 2/2 = 1
x2=6+4 / 2 = 10/2 = 5
6-5x=0
-5x=-6 /:(-5)
x=1,2