Question

Use an expansion formula to find the value of (997) square

Answer 1

Answer:

it can be done in 2 ways -

1. $(990+7)^2$
2. $(1000-3)^2$

Step by step explanation :

1. $(990+7)^2$

=$(990)^{2}$+2×900×7+$(7)^{2}$

=980100+13860+49

=994009

2. $(1000-3)^{2}$

=$(1000)^2$-2×1000×3+$(3)^{2}$

=1000000-6000+9

= 994009

U can follow any method..the answer will be the same.........

hope it was helpful..............

mark it as the brainliest....................