factorise 16 a⁴ - b⁴
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Answer:
=16a∧4-b∧4
=(2a)∧4-b∧4
=(2a∧2)∧2-(b∧2)∧2
=(2a∧2-b∧2)(2a∧2+b∧2)
=(2a-b)(2a+b)(2a∧2+b∧2)
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