If (x+2)( x-2)=x2-k, then what is the value of k?
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Answer:
Value of k is 4 i.e. k = 4
Step-by-step explanation:
(x + 2)(x - 2)=x² - k
=>x² - 2² = x² - k [As (a + b)(a - b) = a² - b²]
=> x² - k = x² - 2² [side change]
=> x² - x² - k = -4
=> -k = -4
=> k = 4 [- cuts off]
Ans:- Value of k is 4 i.e. k = 4
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