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find the perimiter of a triangle whose side are (3x + 2y +9), (6x - y + 7), (-5x + 9y).​

Sagot :

Answer:

4x+10y+16

Step-by-step explanation:

Formula:

P=a+b+c

P= (3x+2y+9)+(6x-y+7)+(-5x+9y)

P= 3x+2y+9+6x-y+7-5x+9y

P= 4x+10y+9+7 (collect like terms)

P=4x+10y+16 (add the numbers)

factorized: 2(2x+5y+8)

-E.F.

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