Tìm x, biết:

a) x3 - 9x² + 27x - 27 = -8

b) 64x³ + 48x² + 12x + 1 = 27

c) (2x - 1)³ - 4x². (2x - 3) = 5

d) (x + 4)³ - x². (x + 12) = 16

Rút gọn:

a) x2 . (x + 4) - (x2 + 1) . (x2 - 1)

b) (y - 3) . (y + 3) . (y2 + 9) - (y2 + 2) . (y2 - 2)

c) (2 + 2y)2 + (x - 2y)2 - 2. (x + 2). (x - 2)

d) (a + b - c)2 - (a - c)2 - 2ab + 2bc

Change these sentences into Reported Speech:

EXERCISES (REPORTED SPEECH: YES/NO QUESTIONS)

1. "Do you enjoy reading?" Phong asked Peter

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2. "Does she like sports?" Hoa asked Lan

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3. "Do your sister and brother go to the same school?" She asked Nam

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4. "Are there some oranges int he fridge?" She asked her mom

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5. "Will it rain tomorrow morning?" He asked his friend

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6. "Did you go to Hue three years ago?" Tam asked Peter

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7. "Are Tam and Hoa late for class?" Tuan asked Lan

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8. She said to me "Can you speak Chinese"

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9. "Will she be here for five days?" Tam asked Thu

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10. "Were you reading this book at 8 o'clock last Sunday?" She asked Ba

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