The answers to the second question on page 148 and the third question on page 149 of the first volume of the second day of the People's Education Edition are attached. ......

1. Original formula =x? +x？ (? Is a symbol of power? 4 is the fourth power) 4

2. The original formula =-P? q？

3. The original formula =2a? 4×2b？ four

4. The original formula =a? 8+a？ 8-2a？ 8=0

5. Original formula = 18x? y

6. Original formula =-6a? b？

7. Original formula =-4x? y？

8. The original formula = 1.3×3.8× 10? 5× 10? =4.94× 10? eight

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