Question

(m-3)²+(m-9)(m+9). Ejfjgekgekegkefkgete

Answer 1

(m-3)²+(m-9)(m+9)= m²-6m+9+m²-81= 2m²-6m-72.

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Answer 2

Ответ:

Объяснение:

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Answer 3

To simplify the expression (m-3)² + (m-9)(m+9), we'll start by expanding and combining like terms:

Step 1: Expand (m-3)² (m-3)² = (m-3)(m-3) = mm - 3m - 3m + 33 = m² - 6m + 9

Step 2: Expand (m-9)(m+9) (m-9)(m+9) = mm + 9m - 9m - 99 = m² + 9m - 9m - 81 = m² - 81

Now, combine the two expanded terms: (m-3)² + (m-9)(m+9) = (m² - 6m + 9) + (m² - 81)

Finally, combine like terms by adding the coefficients of m² and constants: (m² + m²) + (-6m + 0) + (9 - 81) = 2m² - 72

So, the simplified expression is 2m² - 72.