6. Find the value of (7 - 4root3)(7 +4root3).
Answers
Answered by
0
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.
Answered by
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
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