mathematics
one
1.〈 〉〈〈
2.-2ab
3. 16x^2,4x
4. 1,- 1
5.( 1)(3)
6.-(4ab of 5c)
7. Two angles are diagonal and two angles are equal.
8. 1
9.( 1+a^2)( 1+a)( 1-a)(2xy+x^2+y^2)(2xy-x^2-y^2)
10.[a(a+2)] 2S。
calculate
1.2 times (a-b)
2.(2a+9b)(9a+b)
3.-x(x- 1) squared
4.xz(x-2y) square
5. (Male-Female) Party
6.(y+3/2) Party
7.(x+ 1/2) party
8.(X+y-7) Party
9.(m+2n) Square (m-2n)
10.(x+2) square (x-2)
2,
1.x