Question

Rozwiąż równania:
a) 4x-15=0
b) 3(2x-6)=5(x-1)
c) x^2+4x-5=0
d) 6x(x-5)(2x-8)=0
e) 12x^4-3x^2=0

Answer 1

A) 4x-15=0
4x=15
X=15/4
X=3 3/4

b) 3(2x-6)=5(x-1)
6x-18=5x-5
6x-5x=-5+18
X=13

c)x^2+4x-5=0
X^2+5x-x-5=0
X•(x+5)-(x+5)=0
(X+5)•(X-1)=0
X+5=0
X-1=0
X=-5
X=1
X1=-5
X2=1

d)6x(x-5)(2x-8)=0
X•(x-5)(2x-8)=0
X=0
X-5=0
2x-8=0
X=0
X=5
X=4
X1=0
X2=4
X3=5

e)12x^4-3x^2=0
3x^2(4x^2-1)=0
X^2(4x^2-1)=0
X^2=0
4x^2-1=0
X=0
X=-1/2
X=1/2
X1=-1/2
X2=0
X3=1/2