Traditional Culture Encyclopedia - Photography major - Photography interest group
Photography interest group
Suppose there are x players in the eighth grade group and (x+5) players in the seventh grade group.
Then the equation is listed:
x(x+5)+(x+5)x=252,
Finishing: x 2 +5x- 126=0,
Solution: x 1 =- 14, x 2 = 9,
Where x=- 14 is irrelevant, (omitted)
A: There are 9 members in the eighth grade group.
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