factorise the following = l(3m-7n)-n(3m-7n)
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Answer:
Step-by-step explanation:
Step-by-step explanation:
CSA = 32 m sq
= 2(l + b) h = 32
= (l + b) h = 16
TSA = 86 m sq
= 2(lb + bh + lh) = 86
= (lb + bh + lh) = 43
= lb + h(l+b) = 43
= lb + 16 = 43
lb = 43 - 16 = 27
lb = 27
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