Question

6. Find the value of (7 - 4root3)(7 +4root3).​

Answer 1

Answer:

it's answer should be 1

Step-by-step explanation:

let 7 as a and 4 root3 as b ,

(a-b) ( a + b )

a^2 -b^2

so,

7^2 -(4 root 3)^2

49 - 16 × 3

49 - 48

1 ans.

Answer 2

According to formula

( a - b ) ( a + b ) = a² - b²

= ( 7 - 4√3 ) ( 7 + 4√3 )

= ( 7 )² - ( 4√3) ²

= 49 - ( 16 × 3 )

= 49 - 48

= 1