x=-√2
8x=16/10=8/5, x=1/5
x²=6,x=+ si - √6 fiind ecuatie de gradul 2 are 2 solutii +√6 si-√6
3x=√18 ,x=3√2/3=√2
5(x-2)/2=2 ,5(x-2)=4 ,5x-10=4 ,5x=14,x=14/5
x²+mx=(x+3)², x²+mx=x²+6x+9
x(m-6)=9,
x=9/(m-6) se pune conditia ca m≠6
mx-6x=9
mx=9+6x
m=(9+6x)/x pentru x≠0