Answer:
A=2 B=3 C=5 D=6
Explanation:
get the result and subtract it by half
a=2
b=3
c=5
d=6
steps:
1:a.a=4
2×2=4
2:b×b=9
3×3=9
3:c.c=25
5×5=25
4:d.d=36
6×6=36
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