x2 - (x - 4y)2 in the form of factors is :
8y(x - 2y)
8y(x + 2y)
4y(x + 2y)
4y(x - 2y)
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Given,
x2 - (x - 4y)2
= [x + (x - 4y)][x - (x - 4y)]
= (2x - 4y)[x - x + 4y]
= 4y(2x - 4y)
= 8y(x - 2y).
Hence, Option 1 is the correct option.
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2a2 - 18 in the form of factors is :
2(a + 3)(a - 3)
2(a + 1)(a - 9)
2(a - 1)(a - 9)
(2a - 1)(a - 9)
27x3 - 48x in the form of factors is :
3(3x - 4)(3x - 4)
3x(3x + 4)(3x + 4)
3(3x2 - 4x)(3x + 4)
3x(3x - 4)(3x + 4)
Factorise :
a2 - (2a + 3b)2