Question

Va rog ajuti-●●□ ma si pe mine la mateee

Answer 1

1) x²=81
x=9
x=-9

b)x²+2=1
x²=1-2
x²=-1

c)3x²+2,01=2,1
3x²+201/100=21/10
300x²+201=210
300x²=210-201
300x²=9
x=√3/10
x=-√3/10


2)2(x+2)²-11=61
2(x+2)²=61+11
2(x+2)²=72
(x+2)=36
x+2=+6
x+2=6
x+2=-6
x=4
x=-8

3)aici mie mi.a dat 3/11..

(x+2)²-(2-x)²+1=4-3x
2x·4+1=4-3x
8x+1=4-3x
8x+3x=4-1
11x=3
x=3/11

Answer 2

ai rezolvarea în imagine