Question:
what is a root of an equation excatly
Answer:
Let the equation is: ax2 + bx + c = 0
A real number x will be called a solution of a root if it satisfies the equation.
Example: Let the equation is x2 - 1 = 0
=> (x - 1)*(x + 1) = 0
=> x = -1, 1
So, x = 1 and x = -1 are the roots of the given equation.
Again put x = ±1 in the above equations, we get
(±1)2 - 1 = 1 - 1 = 0, which is true since given x2 - 1 = 0
So, x = 1 and x = -1 are the roots of the given equation.
Hope you got the point.
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