P ^ { 4 } - 81 \quad \text { (iii) } x ^ { 4 } - ( y
Evaluate
81ix^{4}-y+P^{4}
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P^{4}-\left(-81ix^{4}\right)-y
Multiply 81i and i to get -81.
P^{4}+81ix^{4}-y
Multiply -1 and -81i to get 81i.
Examples
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Matrix
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Simultaneous equation
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Limits
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