Add & subtract rational expressions: like denominators

Problem

Min-Jun and Harry were each asked to perform the following operation:
start fraction, k, start superscript, 2, end superscript, divided by, 4, k, end fraction, plus, start fraction, 4, k, start superscript, 2, end superscript, minus, 3, divided by, 4, k, end fraction
Their answers are shown below:
Min-JunHarry
start fraction, 5, k, start superscript, 2, end superscript, minus, 3, divided by, 4, k, end fractionstart fraction, 5, k, start superscript, 4, end superscript, minus, 3, divided by, 4, k, end fraction
Which student is correct?
Choose 1 answer:
Choose 1 answer:
Do 4 problems