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Question
If p = −2, q = −1 and r = 3, find the value of p4 + q4 − r4
Solution
\[( - 2 )^4 + ( - 1 )^4 - (3 )^4 \]
\[ = ( - 2 \times - 2 \times - 2 \times - 2) + ( - 1 \times - 1 \times - 1 \times - 1) - (3 \times 3 \times 3 \times 3)\]\[ = 16 + 1 - 81\]
\[ = - 64\]
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