hey there...plzz help me with ques. 4
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Anonymous:
is it in section-A or section-B
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we know that identity (a + b) (a - b) = a² - b²
we can notice that (8x - 1/3) (8x + 1/3) is in the form of (a + b) (a - b)
⇒ (8x - 1/3) (8x + 1/3) can be written as (8x)² - (1/3)² according to the identity above mentioned.
⇒ (8x - 1/3) (8x + 1/3) = (8x)² - (1/3)² = (64x² - 1/9) = RHS
given that LHS = (64x² - b) and also it is clear that RHS = LHS
⇒ (64x² - b) = (64x² - 1/9)
from the above equation we can notice that b is equal = 1/9
so the value of b is 1/9
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