(a-4)(a-5) goes with b
(a-10)(a-2) goes with d
(a-4)(a+5) goes with a
(a-10)(a+2) goes with c
e is not used.
if you want to check take the pairs and foil or box them out.
Answer:
The answer would be 30m squared.
Step-by-step explanation:
Multiply side and base and diveide by two.