50²-40²+90²×2²
=2.500-1.600+8.100×4
=900+8.100×4
=9.000×4
=36.000
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soal
50²-40²+90²×2²
Jawaban
50²-40²+90²×2²
=2.500-1.600+8.100×4
=900+8.100×4
=9.000×4
=36.000
jadi, jawabannya 36.000