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Answers
Here the Concept of Factorisation method has been used . We see we are given the equation and we can solve this using two methods . For each method we need to take terms common and then find the answer . These common terms will give use roots of the equations .
Let's do it !!
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★ Solution :-
Given,
✒ m⁴ - 256 = 0
We already discussed the two methods to solve this question . Please refer to both methods though both gives same answer .
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~ Simplifying by finding all the roots :-
We see that,
• Then, 16 × 16 = 256
• By identity, we know that :: (a + b)(a - b) = a² - b²
So,
• We know that : 4 × 4 = 16
• Now again using the same identity in first term, we get,
• Now combing all, we get,
This is the required Factorisation . Let's now find the roots of the equation .
• Here either (m - 4) = 0, (m + 4) = 0 or (m² + 16) = 0. Then,
✒ m = 4
✒ m = -4
✒ m² = -16 => m = √-16 = 4i where i is √(-1)
So,
This is the required answer .
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★ More to know :-
• Alternative method to solve this question ::
We see we are given,
✒ m⁴ - 256 = 0
This can be written as,
• Now taking the terms common, we get
• This gives us equation like above . Thus both the answers are correct and applicable .
Answer:
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Step-by-step explanation:
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