lexia131 lexia131
  • 03-11-2016
  • Mathematics
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f(-3)=2xsquard root of 2 +9

f32xsquard root of 2 9 class=

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Azieq
Azieq Azieq
  • 03-11-2016
solution = 2(-3)^2 + 9
= 18 + 9
= 27

i am a mathematics teacher. if anything to ask please pm me
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Аноним Аноним
  • 03-11-2016
​√​2x−5=7
​​​
​​(√​2x−5​​​)​^2=7^2 
​​
​​2x−5​​=49
2x
​​=54
x=27
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