Question
Tue September 22, 2009 By: Rajat Asthana

Factorisation

Expert Reply
Fri September 25, 2009

7x2 + 2√14x + 2 = 7x2 + 2√(7x2)x + 2 

=7x2 + 2√7√2x + 2

=(√7x)2 + 2√7√2x + (√2)2

= (√7x + √2)2 = (√7x + √2)(√7x + √2)........................Answer

40x7y2 - 135x4y5

= 5x4y2(8x3 - 27y3)

Using a3 - b3 = (a - b)(a2 + ab + b2)

= 5x4y2(2x - 3y)(4x2 + 6xy + 9y2)    ...............................Answer

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