4w^2-25 factorize the equation
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4W^2-25
(2W)"^2-5^2
A^2 - B^2=(A+B) (A-B)
(2W+5) (2W-5)
2W+5=0, 2W-5=0
2W=-5, 2W=5
W=-5/2, W=5/2
W=-5/2 & 5/2
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