If they are the same length on the line, the. They are equal to eachother. Use this and some algebra to solve the problem.
What’s 6cm and 2.5cm
2 answers:
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The answer to the question
We have
so this is indeed a difference of squares. Factorizing would give
making the answer D.
We can further factor the first term here and write
but that's clearly out of the scope of this question.