Q. Rewrite the function by completing the square.g(x)=4x2−16x+7g(x)=□(x+□)2+□
Identify coefficients: Identify the quadratic coefficient, linear coefficient, and constant term in the given quadratic function.g(x) = 4x2−16x+7Quadratic coefficient (a) = 4Linear coefficient (b) = −16Constant term (c) = 7
Factor out quadratic coefficient: Factor out the quadratic coefficient from the x2 and x terms.g(x)=4(x2−4x)+7
Find value to complete the square: Find the value to complete the square. This is done by taking half of the coefficient of x (after factoring out the quadratic coefficient) and squaring it.Half of the coefficient of x is −24=−2.Squaring this value gives (−2)2=4.
Add and subtract to complete the square: Add and subtract the value found in the previous step inside the parentheses to complete the square. Remember to balance the equation by adding the same value outside the parentheses, multiplied by the quadratic coefficient.g(x) = 4(x^2 - 4x + 4 - 4) + 7To balance the equation, we add 4×4=16 to the constant term.g(x) = 4(x^2 - 4x + 4) - 16 + 7
Combine constant terms: Combine the constant terms outside the parentheses.g(x) = 4(x^2 - 4x + 4) - 9
Write as perfect square: Write the trinomial as a perfect square. g(x)=4(x−2)2−9
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