Question

Question no20
Factorise it urgently

Answer 1

Step-by-step explanation:

$({987})^{2} - ( {13})^{2} \\ =( 987 + 13)(987 - 13) \\ = 1000 \times 974 \\ = 974000$

$( {67.8})^{2} - ( {32.2})^{2} \\ = (67.8 + 32.2)(67.8 - 32.2) \\ = 100 \times 35.6 \\ = 3560$

$\frac{ ({6.7})^{2} - {(3.3)}^{2} }{6.7 - 3.3} \\ = \frac{(6.7 + 3.3)(6.7 - 3.3)}{6.7 - 3.3} \\ = 6.7 + 3.3 \\ = 10$

$\frac{ { {(18.5)}^{2} - (6.5)}^{2} }{18.5 + 6.5} \\ = \frac{(18.5 + 6.5)(18.5 - 6.5)}{18.5 + 6.5} \\ = 18.5 - 6.5 \\ = 12$

$hope \: it \: helps \: u \: \\ \\ \\ \\ \\ \\ plz \: mark \: as \: brainliest$