Q. Rewrite the function by completing the square.f(x)=x2−10x+44, f(x)=(x+□)2+□
Step 1: Start with the function: We start with the function f(x)=x2−10x+44. To complete the square, we need to form a perfect square trinomial from the quadratic and linear terms. This involves finding a value that, when added and subtracted to the function, completes the square.
Step 2: Find the value to complete the square: The coefficient of x is −10. To complete the square, we take half of this coefficient, square it, and add it to and subtract it from the function. Half of −10 is −5, and (−5)2 is 25.
Step 3: Add and subtract to complete the square: We add and subtract 25 inside the function to complete the square. This gives us f(x)=x2−10x+25+44−25.
Step 4: Rewrite the function as a perfect square trinomial: Now we can rewrite the function as a perfect square trinomial plus a constant. The function becomes f(x)=(x−5)2+19.
Step 5: Final result: We have successfully completed the square. The function f(x) is now written as f(x)=(x−5)2+19, which is the completed square form of the original function.
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