The results of (a + b) 178; - (a-b) 178; are calculated
(a+b)²-(a-b)²
=[(a+b)+(a-b)][(a+b)-(a-b)]
=(a+b+a-b)(a+b-a+b)
=2a·2b
=4ab
RELATED INFORMATIONS
- 1. (a-b) (A & # 178; + B & # 178;) (a ^ 4 + B ^ 4) (a + b) how to use the square difference formula
- 2. If we want to make 16x & # 178; + 1 a complete square, we should add the following formula
- 3. The following formula can be calculated by the square difference formula: A. (a + b) (- a-b) B. (a-b) (B-A) C. (a-b) ^ D. (- A + b) (- a-b)
- 4. If the trinomial square difference formula (a + B-C) becomes a square difference formula, which formula should it multiply with
- 5. If a = B, then the following formula does not hold: A & # 178; + B & # 178; = A & # 178; B & # 178; a & # 178; = B & # 178; AC = BC, a-c = c-b
- 6. If A-B = B-C = 3 / 5 and a & # 178; + A & # 178; + A & # 178; = 1, find the value of AC + BC + AC
- 7. If AC & # 178; < BC & # 178;, then the relation between a and B is a___ b. (if C is 0, then the inequality does not hold)
- 8. AB-AC + bc-b & #178; factorization
- 9. Carefully observe the following formula: 2 & # 178; - 1 & # 178; = 2 + 1 2²-1²=2+1 4²-3²=4+3 12²-11²=12+11 ① (omitted, meeting) ② Using the law to calculate: 20 & # 178; - 19 & # 178; + 18 & # 178; - 17 & # 178; + +12²-11²=( )
- 10. Calculate a × (- a ×178; b) of B
- 11. Please use the square difference formula: (a + b) (a-b) = A & # 178; - B & # 178;, calculate: 100 & # 178; - 99 & # 178; + 98 & # 178; - 97 & # 178; +... + 2 & # 178; - 1 & # 178;
- 12. If a & # 178; - B & # 178; - 4 - () = A & # 178; + B & # 178; + AB, then the formula in () is? 1.8-8x/1.2-1.3-3x/2=5x-0.4/0.3
- 13. If we know (a + b) 178; = m, (a-b) 178; = n, then ab=_____
- 14. Given (a + b) 178; = m, (a-b) 178; = n, find the value of: (1) (A & # 178; + B & # 178;) / AB; (2) ab It's represented by m, n
- 15. If a + B = m, ab = n, find the value of a & # 178; + B & # 178
- 16. Sin & # 178; a + cos & # 178; a = 1. What other formulas like this?
- 17. With the four numbers of 1, 5, 6 and 7, through four operations and parentheses, what is the formula of 21?
- 18. According to the requirements, fill 1,2,2 / 1 in the brackets respectively, 5 / 8 divided by (), 5 / 8 divided by (), 5 / 8 divided by ()
- 19. In the formula 6 × 4 + 18 ÷ 6 + 8, the minimum result is______ .
- 20. How to add the bracket 1.7 × 0.9 + 1.2 △ 0.3-0.2 = 48.8 to make the formula hold! 1.7×0.9+1.2÷0.3-0.2=48.8 2.7×0.9+1.2÷0.3-0.2=18.3 3.7×0.9+1.2÷0.3-0.2=75 4.7 × 0.9 + 1.2 △ 0.3-0.2 = 47.6, there are four,