A math problem. Simplify first, then calculate [(2x+y)²-y(y+4x)-8x]/2x x=10
[(2x+y)²-y(y+4x)-8x]/2x
=[4x^2+4xy+y^2-y(y+4x)-8x]/2x
=(4x^2-8x)/2x
=2x-4
Because x = 10
So the original formula is: 16
RELATED INFORMATIONS
- 1. A simple mathematical problem of simplification (2 + 3) / (3 + 3) can be changed into (1 + 2 / 3) / (1 + 3 / 3). How is this changed
- 2. Molecules are: (1 and 2 / 3) + (2 and 3 / 4) + (3 and 4 / 5) + +(1997 of 1996 and 1998) + (1998 of 1997 and 1999) The denominator is: 5 + (8 and 1 / 4) + (11 and 2 / 5) + +(5990 1995 / 1998) + (5993 1996 / 1999)
- 3. 3 to the power of 2010 + 5 * (negative 3) to the power of 2009 + 6 * 3 to the power of 2008 - 2010 * 9 (negative 1) to the power of 2007
- 4. 1482 / (41 * 13-514) if you want to take off the formula, it's the same as the next one
- 5. How to multiply it by 9 in 2009
- 6. A math problem, help me see how to calculate When a person is 20 years old, he starts to save 6000 yuan a year. Assuming that the annual interest rate is 3%, he can save until he is 40 years old. How much money can he get when he is 60 years old? Is there any knowledge about sequence involved? I forgot, please give me some advice
- 7. Electronic calculator has the characteristics of small volume, light weight and easy to carry______ .
- 8. Mathematical problems (simple calculation, 1 1-2+3-4+5…… +101 2 498 by 498-499 by 497 3 26.04 - (4.35 divided by 1.5 + 0.9) multiplied by 4.2 4 3.01-0.25 times 0.4 divided by 0.25 times 0.4
- 9. It is necessary to simplify the calculation process 375×12÷375×12 159×64+27×159+(200-41)×9
- 10. How to simplify and calculate () 1、4/9×[3/4-(7/16-1/4)] 2、(3/4-3/5×5/6)÷(5/8+1/3) 3、1/2÷15×5/6÷3/4 4、[1-(1/12+1/24)×6]÷1/24 5、4/9÷[4/5-(1/5+1/3)] 6、7.8÷[3.2×(1-5/8)+3.6] 7、2/3-3/4×4/11+1/3÷3/7 8、8/9÷[(2/5+1/10)×4/3] 9、18×0.25=12×1/4+2.5 10、[1/2-(3/4-3/5)]÷7/10 11、5÷5/7-5/7×1/5 11、4/9×[3/4-(7/16-1/4)] 12、3/4×6/7+(1-3/4)×6/7 13、1/3×1/2+5/4×2/5
- 11. 49 times 9 / 50 (/ is a fractional line) must be a process
- 12. One third plus one sixth plus one tenth plus one fifteenth plus one twenty-one plus one twenty-eight plus one thirty-six plus one forty-five One fifty-five and one sixty-six is equal to?
- 13. 1 / 3 + 1 / 6 + 1 / 10 + 1 / 15 + 1 / 21 + 1 / 28 + 1 / 36 + 1 / 45 are calculated by simple method
- 14. One plus one third plus one sixth plus one tenth plus one fifteenth plus one twenty-one plus one twenty-eight plus one thirty-six What's one in forty-seven?
- 15. Find out the law of 1,3,6,10,15,21,28,36 and the law of 0,1,3,6,10,15,21
- 16. Divide 30, 42, 55, 66, 78 and 91 into two groups to make the product of each group equal
- 17. Find the rule: 45, 55, 66, 78, -, -, 120, 136
- 18. Calculation: 13 + 16 + 110 + 115 + 121 + 128 + 136 + 145=______ .
- 19. It's a very difficult calculation problem, simple calculation (123456 + 234561 + 345612 + 456123 + 561234 + 612345) what is 7,
- 20. 1. Square of 2004 - square of 2003, (3 2 / 9 + 9 2 / 3) * (except) (1 / 9 + 1 / 3) 3. 2.4 * (multiply) 20 and 3 / 5 + 33.1 * (multiply) 7.64, (2890 + 5 / 6 + 7 / 8 + 7 / 10) * (except) (5 / 6 + 7 / 8 + 7 / 10) eldest brother! Can you write out the idea and process?