use an expansion formula to find value of (997)2
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Answered by
13
(1000-3)^2
(a-b=^2=a^2-2ab+b^2
(1000)^2-2(1000)(3)+(3)^2
1000000-6000+9
1000000+-6009
=993991
(a-b=^2=a^2-2ab+b^2
(1000)^2-2(1000)(3)+(3)^2
1000000-6000+9
1000000+-6009
=993991
Answered by
7
(997)2
=(1000-3)×2
=1000×2 - 3×2
=2000 - 6
=1994
=(1000-3)×2
=1000×2 - 3×2
=2000 - 6
=1994
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