Question 4(ii)
Factorise
$p^4-81$

Question 4(ii)
Simplify:
$(2x+5{)}^2-(2x-5{)}^2$

Question 92 (xxii)

Factorise the following using the identity $a^2-b^2=(a+b)(a-b).$

$16x^4-81$

Question 92 (xxiv)

Factorise the following using the identity $a^2-b^2=(a+b)(a-b).$

$y^4-81$

Question 4(ii)
Simplify:
$(2x+5{)}^2-(2x-5{)}^2$

Question 92 (xxii)

Factorise the following using the identity $a^2-b^2=(a+b)(a-b).$

$16x^4-81$

Question 92 (xxiv)

Factorise the following using the identity $a^2-b^2=(a+b)(a-b).$

$y^4-81$