Math, asked by GlodenSword, 10 months ago

please answer this questions

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Answered by milind2007
0

2.factors of 12 are3,4 and 3+4=7

3.3-3.4+4.4=9-12+16=13

Answered by Anonymous
0

Answer:

1. 1

2. 13

Step-by-step explanation:

1. a² + b² + c²  = (a + b + c )²-2ab-2bc-2ca = (a + b + c )²-2(ab+bc+ca)

                       =  9² - 2(40)

                       =  81 - 80

                       =  1

2. a² - ab + b² = a³ + b³ / a + b = (a+b)³-3ab(a+b) / a + b

                       = 7³ - 3(12)(7) / 7

                       = 343 - 252 / 7

                       =  91 / 7

                       =  13

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