Respuesta :

Happil

Answer:

[tex]a = 5[/tex]

Step-by-step explanation:

Solving [tex]h(-2) = 21[/tex]:

[tex]h(-2) = 21 \\ a(-2)^2 +1 = 21 \\ a(4) +1 = 21 \\ 4a +1 = 21 \\ 4a +1 -1 = 21 -1 \\ 4a = 20 \\ \frac{4a}{4} = \frac{20}{4} \\ a = 5[/tex]

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