Find whether x=5 is the root of the equation x² -13x +40=0

1.	Find whether x=5 is the root of the equation x² -13x +40=0
Answer» p(x)=x²-13x+40=0P(5)=5²-13×5+40=0=25-65+40=0=-40+40=0=0=0Thus,it is the root of the equation. If x= 5 is the root of the equation x² - 13x +40 , then the value of whole equation should be 0....So,Let x=5, then,(5)² - 13*5 + 40 = 025-65+40 =025-25=00=0Hence, x=5 is the root of the equation.

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