Question

add

-1 mn+5,12mn+2,mn+8-2mn-3

Answer 1

(-1mn+5)+(12mn+2)+(mn+8-2mn-3)

=>-1mn-2mn+12mn+mn+5+2+8-3

=>-3mn+13mn+12

=>10mn+12

Hope it helps!!!!!!!!!

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Answer 2

Answer:

Required addition is 3(5+4mn)

Step-by-step explanation:

Here given numbers are -1mn+5),12mn+2,mn+8,-2mn-3.

Addition of the given numbers

$= - 1mn + 5 + 12mn + 2 + mn + 8 - 2mn - 3 \\ = (5 + 2 + 8) + ( - 1 + 12 + 1)mn \\ = 15 + 12mn \\ = 3(5 + 4mn)$

So, required addition is 3(5+4mn)

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

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2) https://brainly.in/question/1169549

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