em3489 em3489
  • 03-04-2019
  • Mathematics
contestada

(8q+5)^2=64q^2+[]q+25
What is the missing value? []

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sqdancefan
sqdancefan sqdancefan
  • 03-04-2019

Answer:

  80

Step-by-step explanation:

The square of a binomial is ...

  (a +b)^2 = a^2 + 2ab + b^2

You have a=8q, b=5, so the square is ...

  (8q)^2 + 2(8q)(5) + (5)^2

  = 64q^2 +80q +25

The coefficient missing from your given expression is 80.

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