Question

Q.6 Evaluate the following by using a suitable identity :
$75 {}^{2} - 65 {}^{2}$
​

Answer 1

Answer:

1400

Step-by-step explanation:

$by \: using \: formula \: \\ {a}^{2} - {b}^{2} = (a + b) \: (a - b)$

${75}^{2} - {65}^{2} = (75 + 65)(75 - 65)$

$= (140)(10)$

$= 1400$

I hope this will help you out ☺️ ☺️