5. factorise 100a2 + 20a +1
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4
Step-by-step explanation:
100a^2 + 20a + 1
100a^2 + 10a +10a +1
10a(10a+ 1) + 1(10a+1)
( 10a+1 )( 10a+1 )
(10a+1)^2
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1
121a2
121÷2
6.5
answer mark me the score
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