What value for c will make the expression a perfect square trinomial? x squared minus 7 x plus c

For x² − 7x + c to be a perfect square trinomial, take half the coefficient of x and square it: (−7 ÷ 2)² = 49/4. Thus c must be 49/4, making the expression (x − 7/2)²; the correct choice is 49 fourths.

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