Q. Rewrite the equation by completing the square.4x2−12x+9=0(x+□)2=□
Identifying Coefficients: We start by identifying the coefficient of x2, which is 4, and the coefficient of x, which is −12. The constant term is 9. The equation is already set to equal zero, which is the first step in completing the square.
Factoring Out Coefficient: To complete the square, we need to factor out the coefficient of x2 from the first two terms. In this case, we factor out 4 from 4x2 and −12x.4(x2−3x)+9=0
Completing the Square: Next, we find the value that completes the square for the expression x2−3x. To do this, we take half of the coefficient of x, which is −23, and square it, resulting in (23)2=49.
Adding and Subtracting Value: We add and subtract this value inside the parentheses to maintain the equality. Since we factored out a 4 at the beginning, we need to add and subtract 4 times the value that completes the square.4(x2−3x+49−49)+9=0
Simplifying the Equation: Now we simplify the equation by combining like terms inside the parentheses and adjusting the constant term outside.4(x2−3x+49)−4(49)+9=0
Simplifying Constants: Simplify the constants outside the parentheses.4(x2−3x+49)−9+9=04(x2−3x+49)=0
Writing as Perfect Square Trinomial: The expression inside the parentheses is now a perfect square trinomial, which can be written as (x−23)2.4(x−23)2=0
Rewriting the Equation: Finally, we rewrite the equation in the completed square form. (x−23)2=0
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