please please isko solve krdo please
factorise:1+9a(2-7a)
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1+9a(2-7a) =0
1+18a-63a²=0
63a²-18a-1=0
63a²+3a-21a -1=0
by taking common
3a(21a+1) -1(21a+1)=0
3a-1=0. 21a+1=0
a=1/3. a= -1/21
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I have a question for u do you read in RK Academic Point HS please tell meand os your name is Shristi
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