The eighth grade mathematics book of Beijing Normal University Edition, Volume II, 6 1 page, the first question 9 10, and the second question 2 4 6 8, the process of finding the answer quickly is very
The eighth grade mathematics book of Beijing Normal University Edition, Volume II, 6 1 page, the first question 9 10, and the second question 2 4 6 8, the process of finding the answer quickly is very detailed.
Fuck, it's so simple to ask people. . . . . The square of the ninth question 4x(y+z) and the tenth question (x+y-7) 2y (y-x) (x-1) 4 (a * 2-4).
6 (ax+8) squared (a+b+3) squared. . . .