Find the value of 'p' using algebraic Identities From the given expression : (198)^2 - (98)^2 = 74p^2
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Formula:
a² - b² = (a - b) (a + b)
Soln.
198² - 98² = 74p²
=> (198 - 98) (198 + 98) = 74p²
=> (100) (296) = 74p²
=> 29600 = 74p²
=> p² = 29600/74
=> p² = 400
=> p = ± √400
=> p = ± 20
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