Jawapan

2016-06-14T00:06:41+08:00
1)15s-10t
2)4s+2t(4s+2t)
16s²+8st+8st+4t²
16s²+16st+4t²
3)2b+10+(3+3b)(3+3b)
2b+10+9+9b+9b+9b²
=20b+19+9b²
4)(5p-5q)(5p-5q)-4pq+3p²
25p²-25pq-25pq+25q²-4pq+3p²
27p²-54pq+25q²
5)3q+4(3q+4)-5q+1
9q²+12q+12q+16+1-5q
9q²+19q+17
6)m²-mn-3mn+3n²
=m²+3n²-4mn
7)p+5q(p+5q)
p²+5pq+5pq+25q²
=p²+10pq+25q²
8)m-1(m-1)
m²-m-m+2
m²-2m+2

2016-06-14T02:05:16+08:00
1) 15S - 10ST

2) 16s^{2}  + 16st +  4t^{2}

3) 2b + 10 + 9 + 18b +  9b^{2}
    9b^{2} + 20b + 19

4 )  25p^{2} -50pq +   25q^{2} - 4pq +  3p^{2}
     28p^{2} +   25q^{2} - 54q

5)  9q^{2}  + 24q + 16 - 5q + 1
     9q^{2} + 19q + 17

6)  m^{2} -mn -3mn +  3n^{2}
     m^{2} -4mn +  3n^{2}

7)  p^{2}  + 10pq +  25q^{2}

8)  m^{2}  -2m + 1