Please help ASAP
no useless writing
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To solve :
Solution :
Note- using identity [ a² - b² = (a + b)(a - b) ]
➝ x² - 9 = (x+3)(x-3)
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Taking LCM on LHS ,
LCM of (x-3) and (x-3)(x+3) = (x-3)(x+3)
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ANSWER : x = 18
Verified answer
We are given .
How to solve if the denominator has an unknown?
This equation is called a rational equation.
To solve this equation no unknown should be in the denominator. So, we multiply to the denominator to remove it.
The denominator has HCF of . So we multiply on both sides.
We solve this equation and get as the solution.
Also, we need to check whether the denominator becomes 0. The solution should not belong to .
and , so the solution is valid.