If (25-4x²) = (5+ax) (5-ax) let's find the positive value of a.
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Step-by-step explanation:
(25-4x²) = (5+ax)*(5-ax)
25-4x² = 5² - a²x²
-4x² = 25 -25 -a²x²
-4 = a²x² -x² (+25-25 = 0)
a² = 4 (x²-x²=0)
a = 2 Ans
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