Question

49 x 49 in algebraic formula ​

Answer 1

Answer:

$49 \times 49 \\ (40 + 9) \times( 40 + 9) \\ {(40 + 9)}^{2} \\ = {40 }^{2} +( 2 \times 40 \times 9) + {9}^{2} \\ = 1600 + 720 + 81 \\ = 2401$