Factorise :
a2 - (2a + 3b)2
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Given,
= (a + 2a + 3b)[a - (2a + 3b)]
= (3a + 3b)(a - 2a - 3b)
= (3a + 3b)(-a - 3b)
= -3(a + b)(a + 3b)
Hence, a2 - (2a + 3b)2 = -3(a + b)(a + 3b).
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x2 - (x - 4y)2 in the form of factors is :
8y(x - 2y)
8y(x + 2y)
4y(x + 2y)
4y(x - 2y)
25(2a - b)2 - 81b2
50a3 - 2a