Нужна помощь!!!! пожалуйстааа

Question

Нужна помощь!!!! пожалуйстааа

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Answer 1

1) 6x-2*4x+10-12x+6*6x-12=48
    4x+4=48
    4x=44
    x=11

Comments

2) 9x^2 -2 * 3x * (-1) +1 = 49 -2 * 7 * (-5x) + 25x^2 - 16 x^2 - 2 * 4x*5 + 25

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9x^2 + 6x + 1 = 25x^2 + 70x - 49 - 16x^2 - 40x + 25

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25x^2 + 70x - 49 -16x^2 -40x + 25 - 9x^2 - 6x - 1

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x^2 + 24x + 23

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D=b^2-4*a*c

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D = 576 - 4 * 1 * 23 = 576 - 92 =484

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корень из 484 = 22

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x1 = (-24 - 22)/2 = -23

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x2 = (-24 + 22)/2 = -1