if a+b=7 and a^2+b^2=35 then ab=____
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I also want the same pls help me
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(a+b)^2=a^2 + b^2+2ab
7^2=25+2ab
49-25=2ab
24=2ab
24/2=ab
ab=12
7^2=25+2ab
49-25=2ab
24=2ab
24/2=ab
ab=12
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