Q. Rewrite the function by completing the square.f(x)=x2+8x−29f(x)=(x+□)2+□
Given quadratic function: We start with the given quadratic function f(x)=x2+8x−29. To complete the square, we need to form a perfect square trinomial from the x2 and 8x terms.
Forming a perfect square trinomial: To create a perfect square trinomial, we take the coefficient of the x term, which is 8, divide it by 2, and then square it. This gives us (28)2=42=16.
Adding and subtracting to maintain equality: We add and subtract this number 16 inside the function to maintain the equality. This gives us f(x)=x2+8x+16−16−29.
Rewriting the function by grouping: Now we can rewrite the function by grouping the perfect square trinomial and combining the constants: f(x)=(x2+8x+16)−16−29.
Factoring the perfect square trinomial: The perfect square trinomial x2+8x+16 can be factored into (x+4)2. So, we have f(x)=(x+4)2−16−29.
Combining the constants: Next, we combine the constants −16 and −29 to get −45. This gives us the completed square form of the function: f(x)=(x+4)2−45.
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