tricialebort
tricialebort tricialebort
  • 12-10-2021
  • Mathematics
contestada

find (f.g)(-3)when f(x)=-5x-7 and g(x)= 7x^2-2x+9​

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discipulus
discipulus discipulus
  • 13-10-2021

Answer:

[tex]f(7 {x}^{2} - 2x + 9) \\ = - 5(7 {x}^{2} - 2x + 9) - 7 \\ = - 35 {x}^{2} + 10x - 45 - 7 \\ = - 35 {x}^{2} + 10x - 38 \\ f.g( - 3) = - 35 {( - 3)}^{2} + 10( - 3) - 38 \\ f.g( - 3) = -383[/tex]

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