Find the value of 21x3 – 63x2 + 3 for x = 4
Answers
Answered by
0
Answer:
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Step-by-step explanation:
399
Answered by
1
Answer:
= 339
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Step-by-step explanation:
=> 21 x³ - 63 x² + 3
=> 3 (7 x³ - 21 x² + 1)
=> 3 [7x² (x - 3) + 1]
Replacing x with 4 as per the question :-
=> 3 [{7(4)² (4 - 3)} + 1]
=> 3 [(7 x 16 x 1 ) + 1]
=> 3 [112 + 1]
=> 3 x 113
= 339
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