Question

2x2-162=0



3y2+7=25



2a2-7=25

Answer 1

Resolver:

3x^2-162=0

3y^2+7=25

2a^2-7=25

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2x^2-162=0

2x^2=162

x^2=162/2

x=√81

x= 9 ; -9

Verificación:

2(9)^2-162=0
162 -162 = 0
0=0


3y^2+7=25

3y^2=25-7

y^2=18/3

y= √6 ; -√6

Verificación:

3(√6)^2=25-7
18=18

2a^2-7=25

2a^2=25+7

a^2=32/2

a=√16

a=4;-4

Verificación:

2(4)^2-7=25
32 -7=25
25=25