Solve the Quadratic Inequality: x²-6x+9>0

Question

Solve the following equation:

x^2-6x+9>0

Video Solution

Step-by-Step Solution

To solve the quadratic inequality x26x+9>0 x^2 - 6x + 9 > 0 , we first rewrite the quadratic expression in a recognizable form:

The expression can be rewritten as:

x26x+9=(x3)2 x^2 - 6x + 9 = (x-3)^2

This is a perfect square trinomial, where (x3)2>0 (x-3)^2 > 0 . We know that a square of a real number is only greater than zero when the number itself is not zero.

Thus, (x3)2>0 (x-3)^2 > 0 implies x30 x - 3 \neq 0 , meaning x3 x \neq 3 .

Consequently, the inequality x26x+9>0 x^2 - 6x + 9 > 0 holds true for all x x except x=3 x = 3 .

Therefore, the solution to the inequality is:

3x 3 \neq x

Answer

3x 3 ≠ x


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