Factorise the expression x 2 −6x+9.
Question
Factorise the expression x 2 −6x+9.
Solution
Sure, here are the steps to factorise the expression x^2 - 6x + 9:
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Identify the expression: The expression given is a quadratic expression, which is in the form of ax^2 + bx + c. Here, a = 1, b = -6, and c = 9.
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Look for perfect squares: In this case, x^2 is the square of x, and 9 is the square of 3.
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Check if 2sqrt(a)sqrt(c) equals to b: Here, 2sqrt(1)sqrt(9) equals to 213 = 6, which is the absolute value of b (-6).
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Since all conditions for a perfect square trinomial are satisfied, the expression can be written as (sqrt(a)x - sqrt(c))^2.
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Therefore, the factorised form of the expression x^2 - 6x + 9 is (x - 3)^2.
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Instructions: Match the quadratic equation to the type of factoring that could be used to solve it. 9x2−16=09𝑥2−16=0 3x2−27x=03𝑥2−27𝑥=0 x2+6x+9=0𝑥2+6𝑥+9=0
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