find the value of A and B if 5 + 2 under root 3 upon 7 + 4 under root 3 equals to a + b under root 3
Answers
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Answer: a=11 and b=6
Step-by-step explanation:
in the LHS ( left hand side ) we have : 5+2√3
----------- = a+b√3
7+4√ 3
on rationalising the denominator , we get :
5+2√3 × 7-4√3
------------ ----------
7+4√3 × 7-4√3
on simplifying , we get :
35-20√3 +14√3-24
- ----------------------------
(7)² -(4√3) ²
- 11-6√3
-------------
49-48
→ 11-6√3
ON COMPARING BOTH SIDES :
a=11 { b≠ -6 because , question says to find the
b=6 value of b , not -b }