Question

Resolva as equaçoes do 2 grau
1) 2x²-34=12
2) 4 -5x²=45
3) 2x²+88=0
4) 8x²=64
5) 9x²-81=12

Answer 1

1) 2x²-34=12
2x²=12+34
2x²=46
X²=46/2
X²=23
X=±√23

2) 4-5x²=45
-5x²=45-4
-5x²=41
X²=41/(-5)
X²=-8,2
X=±√-8,2

3) 2x²+88=0
2x²=-88
X²=-88/2
X²=-44
X=±√-44

4) 8x²=64
X²=64/8
X²=8
X=±√8

5) 9x²-81=12
9x²=12+81
9x²=93
X²=93/9
X²=10,333...
X=±√10,333...


Espero ter ajudado :-)