|

Mathematics

Is x = 5 a solution of the equation x² - 2x - 15 = 0 ?

Quadratic Equations

44 Likes

Answer

Substituting, x = 5 in x² - 2x - 15 = 0 we get,

⇒ 5² - 2(5) - 15 = 0

⇒ 25 - 10 - 15 = 0

⇒ 25 - 25 = 0

⇒ 0 = 0

Since, L.H.S. = R.H.S.

Hence, proved that x = 5 is a solution of the equation x² - 2x - 15 = 0.

Answered By

28 Likes

Related Questions

Find which of the following equations are quadratic :
(x - 4)(3x + 1) = (3x - 1)(x + 2)
View Answer

Find which of the following equations are quadratic :
7x³ - 2x² + 10 = (2x - 5)²
View Answer
Is x = -3 a solution of the equation 2x² - 7x + 9 = 0 ?
View Answer
If $\sqrt{\dfrac{2}{3}}$ is a solution of equation 3x² + mx + 2 = 0, find the value of m.
View Answer