factorise 4x2 - 16y2
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Hy!!
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To factorise:
4x^2 - 16y^2
= (2x)^2 - (4y)^2
Since a^2 - b^2 = (a+b) (a-b)
(2x)^2 - (4y)^2
= (2x + 4y) (2x - 4y)
Hope it's helpful to u.
_____________________
To factorise:
4x^2 - 16y^2
= (2x)^2 - (4y)^2
Since a^2 - b^2 = (a+b) (a-b)
(2x)^2 - (4y)^2
= (2x + 4y) (2x - 4y)
Hope it's helpful to u.
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