Q. Rewrite the equation by completing the square.4x2+28x+49=0(x+□)2=□
Identify quadratic equation and terms: Identify the given quadratic equation and its terms.The given equation is 4x2+28x+49=0. We need to complete the square for this equation.
Factor out coefficient of x^2: Factor out the coefficient of x2 from the first two terms.Since the coefficient of x2 is 4, we factor it out from the first two terms to make the x2 term a perfect square.4(x2+7x)+49=0
Find value to complete the square: Find the value to complete the square.To complete the square, we need to add and subtract the square of half the coefficient of x inside the parentheses. The coefficient of x is 7, so half of 7 is 3.5, and the square of 3.5 is 12.25.4(x2+7x+12.25−12.25)+49=0
Add and subtract value inside parentheses: Add and subtract the value inside the parentheses and simplify.We add and subtract 12.25 inside the parentheses and factor the perfect square trinomial.4((x+3.5)2−12.25)+49=0
Distribute and combine like terms: Distribute the 4 and combine like terms.Now we distribute the 4 into the parentheses and combine the constant terms.4(x+3.5)2−49+49=0
Simplify the equation: Simplify the equation.The −49 and +49 cancel each other out, leaving us with the completed square form of the equation.4(x+3.5)2=0
Write final completed square form: Write the final completed square form.The final completed square form of the equation is:(x+3.5)2=0
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