Question

ajutatima,multumesc1

Answer 1

a) 2x^2 + 5=7
2x^2=2
x^2=1
x=1
b)4x^2-2=0
4x^2=2
2x^2=1
x^2=1/2
x=1/√2
c)19x^2 + 18 = 17
19x^2=-1
x^2=-1/19
x=-1/√19
d)2x^2=1- (-1)^2010
2x^2= 1-1
2x^2=0
x=0
e) 2(x+1)^2 + 4=10
2(x+1)^2=6
(x+1)^2=3
x+1=√3
x=√3 -1
f) -7/3 * x^2 = -28/3
inmultimi intreaga ecuatie cu -3
7x^2=28
x^2=4
x=2