Question

3. Use the formula to find the value: 97 x 103​

Answer 1

Step-by-step explanation:

ans is in following picture

Answer 2

Answer:

$\Huge \mathbf \color{plum}{An}{\mathfrak {\color{red}{sw} {\mathbf{\color{blue}{er}}}}}$

$\small \mathbf \color{navy}{97 \times 103}$

$\small \mathbf \green{97 = 100 - 3}$

$\small \bf \green{103 = 100 + 3}$

$\small \bf \orange{∴97 \times 103 }$

$\small \mathbf \blue{ = (100 - 3)(100 + 3)}$

$\small \mathbf \color{plum}{Using \: Identity}{\red{ \: \: [(a - b)(a + b) = {a}^{2} - {b}^{2} ] }}$

$\small \mathbf \purple{∴ ({100})^{2} - ({3})^{2} }$

$\small \mathbf \purple{ = 10000 - 9}$

$\small \mathbf \purple{ = 9991}$

$\: \: \: \: \:$

${\boxed {\boxed {\underline {\underline {\bold {\color{skyblue}{9991}}}}}}}$