Correct the mistake in these sentences.

1. Wind power will be using at this time next year.

2. The power station will be rebuild at the beginning of next year.

3. They will be put solar panels in the back yard next Saturday.

4. We will be taken a test on source of energy at 10 o'clock on Tuesday.

5. At this time next week, we will be stay with my brother in SLHPP.

CMR các đẳng thức sau vô nghiệm:

a) f(x) = x². (x² + 1) + x². (x + 3) + 3x + 3

b) g(x) = x². (x² - x + 1) + 5x² - 5x + 5