factorise a. a⁴- b⁴
b. P²+6p+8
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Step-by-step explanation:
a) a^4-b^4
=(a^2+b^2)(a^2-b^2)
b) p^2+6p+8
=p^2+4p+2p+8
=p(p+4)+2(p+4)
=(p+4)(p+2)
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