(a) Without using a calculator, work out the value of (4) 2 . (b) Press the following...
Question:
(a) Without using a calculator, work out the value of (−4)2.
(b) Press the following key sequence on your calculator:
(-) 4 x2
Explain carefully why this does not give the same result as part (a) and give an alternative key sequence that does give the correct answer.
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a 16 b Presented with the calculation 4 y...View the full answer
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