Q. Solve for all values of x.x+9x−5=x2Answer: x=
Find Common Denominator: First, we need to find a common denominator to combine the fractions on both sides of the equation. The common denominator here is x(x+9).
Multiply by Common Denominator: Next, we multiply both sides of the equation by the common denominator to eliminate the fractions: x(x+9)×(x+9)(x−5)=x(x+9)×x2
Simplify Equation: Simplify the equation by canceling out the common terms on both sides:x(x−5)=2(x+9)
Distribute and Combine Terms: Now, distribute the x on the left side and the 2 on the right side: x2−5x=2x+18
Set Equation to Zero: Bring all terms to one side to set the equation to zero and combine like terms:x2−5x−2x−18=0x2−7x−18=0
Solve for x: Set each factor equal to zero and solve for x:x−9=0 or x+2=0x=9 or x=−2
Check Solutions: We must check these solutions to ensure they do not make the original equation undefined by causing division by zero. The original equation has x in the denominator, so x cannot be 0. Also, x cannot be −9 because that would make the denominator of the left side of the original equation zero.
Check x=9: Checking x=9: 9+99−5=92 184=92 92=92 (This is true, so x=9 is a valid solution.)
Check x=−2: Checking x=−2: −2+9−2−5=−22 −7/7=−1 −1=−1 (This is true, but we must remember that x cannot be −2 because it would make the original right side of the equation undefined.)
Discard Invalid Solution: Since x=−2 makes the original equation undefined, we discard this solution. The only solution is x=9.
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