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4(x² + 4x + 4) - 4x² + 4x - 1 = -5
4x² + 16x + 16 - 4x² + 4x - 1 = -5
20x + 15 = -5
20x = -20
x = -1
9- 6x + x² - x² - ⅔x - ¹/₉ = ²/₉
8 ⁸/₉ - 6 ⅔ x = ²/₉
- 6⅔x = - ⁷⁸/₉
-60 x = - 78
x = 1,3
a) 4(x²+4x+4)-(4x²-4x+1)=-54x²+16x+16 - 4x²+4x-1=-520x=-20 /:20x=-1
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4(x² + 4x + 4) - 4x² + 4x - 1 = -5
4x² + 16x + 16 - 4x² + 4x - 1 = -5
20x + 15 = -5
20x = -20
x = -1
9- 6x + x² - x² - ⅔x - ¹/₉ = ²/₉
8 ⁸/₉ - 6 ⅔ x = ²/₉
- 6⅔x = - ⁷⁸/₉
-60 x = - 78
x = 1,3
a) 4(x²+4x+4)-(4x²-4x+1)=-5
4x²+16x+16 - 4x²+4x-1=-5
20x=-20 /:20
x=-1