Factorise each of the following.
(a) 4(3t - 1)² – (7t + 5)²
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Step-by-step explanation:
(a) 4(3t - 1)² – (7t + 5)²
= 4(9t²-6t+1)-(49t²+70t+25)
= 36t²-24t+4-49t²-70t-25
= 85t²-94t-21
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