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MzMnadianzeharvae MzMnadianzeharvae
  • 08-02-2016
  • Mathematics
Answered

Find the product mentally.

(2m - 9)^2

Verified Answer :

Anonymous Anonymous
  • 08-02-2016
  • - Solve:

    \(=2m+-9*2m+-9\)
    \(2m*2m+2m*-9+-9*2m+-9*-9\)
    \(4m^2-18m-18m+81\)
    \(4m^2-36m+81\)

    Your final answer is 4m^2−36m+81
Answer Link
Leader
Leader Leader
  • 08-02-2016

Use the formula: (a-b)² = a² -2ab + b²

(2m-9)² = (2m)² - 2(2m)(9) + 9²

= 4m² - 36m + 81

Answer Link

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