Question

Use (a-b)square= a square -2ab +b square to find the value of (199)square ​

Answer 1

Step-by-step explanation:

(a-b)^2=a^2+b^2-2ab

(199)^2=(200-1)^2

=>(200)^2+(1)^2-2(200)(1)

=>40000+1-400

=>39,601

Answer 2

39601

Step-by-step explanation:

Given Instruction:

Use (a - b)²

To find:

199²

Solution:

$199 {}^{2} \\ \\ (200 - 1) {}^{2} \\ \\ {(200)}^{2} - 2.200.1 + {1}^{2} \\ \\ 40000 + 1 - 400 \\ \\ 39601$