Question

Ajutati-ma la itemul 8 va roooooog!!!!!!!!

Answer 1

a)(x+1)(x-2)=0⇒
x+1=0⇒x=-1
x-2=0⇒x=2
S={-1,2}
b)x²-16=0
x²-4²=0
(x-4)(x+4)=0
x-4=0⇒x=4
x+4=0⇒x=-4
S={-4,4}
c)x²=3x
x²-3x=0
x(x-3)=0
x=0
x-3=0⇒x=3
S={0,3}