2.(am)n？ =? Power of amn, constant basis, exponential multiplication.

3.(ab)n？ =? anbn？ The power of the product is equal to multiplying each factor of the product by the power, and then multiplying it by the power.

4 . m(a+b+c)=？ Ma+mb+mc (single multiplication polynomial)

5 . ma+m b+MC？ =? M(a+b+c) (extracting common factor)

Good morning? =? Am-n (the first volume of the eighth grade? It is stipulated that a ≠ 0, m and n are all positive integers, m > n)

Same base powers divides, the base remains the same, and the exponent is subtracted.

7. Square difference formula (a+b)(a-b)=? a2？ –? b2？ The product of the sum of two numbers and the difference between the two numbers is equal to the square difference between the two numbers. [Formula factorization 1: A2? –? b2？ =? (a+b)(a-b)]

8. Complete square formula (a+b)2? =? a2+2ab+b2？ (a-b)2？ =a2-2ab+b2？ The square of the sum (or difference) of two numbers is equal to the sum of their squares plus (or minus) twice their product. [Formula Normal Factorization 2:? a2 2ab+b2=(a b)2]

9. add brackets a+b+c? =? a+(b+c)？ a-b-c？ =? a-(b+c)

10.？ a0？ = 1? (a≠0) Any number whose power is not equal to 0 is equal to 1.