sophiakrie sophiakrie
  • 04-06-2019
  • Mathematics
contestada

If x = -2, then x 2 - 7x + 10 equals

A) 0
B) 20
C) 28

Respuesta :

mercedescookhannah
mercedescookhannah mercedescookhannah
  • 04-06-2019
I think the answer is b
Answer Link
luisejr77
luisejr77 luisejr77
  • 04-06-2019

Answer: OPTION C

Step-by-step explanation:

Given the quadratic equation [tex]x^2 - 7x + 10[/tex] and the value of the variable "x" [tex]x = -2[/tex], you need to substitute the given value of the variable. Then:

[tex]=(-2)^2 - 7(-2) + 10[/tex]

And finally, you need to evaluate.

Remember the multiplication of signs:

[tex](+)(+)=+\\(-)(-)=+\\(-)(+)=-[/tex]

Therefore, you get the following result:

[tex]=4+14 + 10[/tex]

[tex]=28[/tex]

This matches with the option C.

Answer Link

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