Question

ajutor , pss. dau coronita ♥

Answer 1

a)2√3+√27=2√3+3√3=5√3
b)a∩q={-1/2,-√2 7/9
c)║x-√2║=√2⇒x-√2=√2⇒x=√2+√2⇒x=2√2
d)(2a+1)²-(2a)²=4a²+4a+1-4a²=4a+1
e)-2
a(-2)+1=3⇒-2a=3-1⇒-2a=2⇒a=-2/2⇒a=-1
succes