Answer:
➢ 1. Draw base AB of 6cm then construct 90° on A then take a compass and open it 4cm then from point A cut the arc on that 90° and name that point C. Join B to C triangle ABC will be the required triangle.

The given polynomial is
→ 6 ac - 15 a d- 8 b c + 2 b d
→ 3× 2×a×c - 3×5×a×d - 2×2×2× b×c + 2×b×d
→ 3 a ( 2 c -5 d) - 2 b(4 c -d)
I haven't done this in a while but I think the answer is 16
100/12=8⅓
multiply the other numbers by 8⅓ to get
15*8⅓=125
21*8⅓=175
the lengths are 100,125,175