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