anonymous
  • anonymous
The function f(x) = 2x^2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value? A. 1 b. -1 C. 2 D. -2 E. -3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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campbell_st
  • campbell_st
have you substituted any values to check them...?
campbell_st
  • campbell_st
as an example x= 1 y = 2(1)^2 + 3(1) + 5 = 10 so its not x = 1
anonymous
  • anonymous
o that's all i have to do?

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Saiyan
  • Saiyan
yep
anonymous
  • anonymous
@campbell_st im lost i thought i had it but i dont
campbell_st
  • campbell_st
ok so the next value is x = -1 substitute that y = 2(-1)^2 + 3(-1) + 5 you need a little care here as squaring a negative gives a positive so y = 2 - 3 + 5 y = 4 so it't not x = -1 just repeat the process
anonymous
  • anonymous
ok thanks

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