Q5 of 59 Page 162

Expand:

(2x – y)(2x + y)(4x2 + y2)

Applying the formula (a + b)(a - b) = a2 - b2 on first two terms


(2x – y)(2x + y)(4x2 + y2) = (4x2 - y2) (4x2 + y2)


Applying the formula (a + b)(a - b) = a2 - b2 again


⇒ (2x – y)(2x + y)(4x2 + y2) = (16x4 – y4)


More from this chapter

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5

Expand:

 5

Expand:

(x – 1)(x + 1)(x2 + 1)(x4 + 1)

 6

Use appropriate formulae and compute:

(103)2

 6

Use appropriate formulae and compute:

(96)2