Mr. Knotts found the difference of the following expression. Which statement is true about mr. Knotts’s work? step 1: step 2: step 3: step 4: in step 1, he did not correctly factor the denominator. In step 2, he did not use the correct common denominator. In step 3, he did not distribute the negative sign when he subtracted. In step 4, he did not correctly subtract the numerator.