Confused! Which letter is the mistake?
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Answer:
(1)
Step-by-step explanation:
You can not cancel "x" in this way:
[tex]\dfrac{4x\!\!\!\!\!\diagup^0-8}{10y}\cdot\dfrac{15y^2}{5x\!\!\!\!\!\diagup_{1x}-10}[/tex]
In this expression, you can not cancel "x".