(2)
(b) A student added copper metal to colourless silver nitrate solution.
The student observed:
pale grey crystals forming
the solution turning blue.
.
Explain how these observations show that silver is less reactive than copper.
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Ответ:
the answer is -x squared - 14x- 15 this is how u simplify it u need to use a squared + 2ab plus b squared and plug that in like that