Question

Привет помогите пожалуйста с №80 в каждом варианте

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Answer 1

1 вариант:

1) 6a^2 – 9a^2 + 5ab + 3a^2 – 2ab = 3ab = 3 *(-0.15)*6 = - 2.7

2) 7xy – 3x^2 + 9x^2 – 6x^2 – 2xy = 5xy = 5 * (-19/15)*(39/19) = - 13

2 вариант:

1) 12x^2 – 5x^2 – 2xy – 7x^2 + 4xy = 2xy = 2*0.35*4 = 2.8

2) 3a^2 – 8ab + a^2 – 7ab – 4a^2 = -15ab = -15*(35/17)*(-17/7) = 3

3 вариант:

1)  4a^2 – 8a^2 +2ab + 3ab + 4a^2 = 5ab = 5*0.2*3 = 3

2) 5xy – x^2 + 7x^2 – 6x^2 + 3xy = 8xy = 8*(-3/2)*(7/4) = - 21