Express (x2 + 8x - 15)(x2 - 8x - 15) as the difference of two squares.
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Given,
⇒ (x2 + 8x - 15)(x2 - 8x - 15)
⇒ [(x2 - 15) + (8x)] [(x2 - 15) - (8x)]
⇒ (x2 - 15)2 - (8x)2.
Hence, (x2 + 8x - 15)(x2 - 8x - 15) = (x2 - 15)2 - (8x)2.
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Factorize:
4x2 - 12ax - y2 - z2 - 2yz + 9a2
9a2 + 3a - 8b - 64b2
Evaluate:
(i) (674)2 - (326)2
(ii) (18.6)2 - (1.4)2
Factorise:
(x4 + x2y2 + y4)