If a=5-2√6 and b=5+2√6 then find a^2+b^2+5ab
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a²=(5-2√6)²
=25+24-20√6
=49-20√6
b²=(5+2√6)²
=25+24+20√6
=49+20√6
5ab=5(5-2√6)(5+2√6)
=5(25+10√6-10√6-24)
=5(1)
=5
a²+b² +5ab=49-20√6+49+20√6+5
=49+49+5
=103
hope it helps you......
=25+24-20√6
=49-20√6
b²=(5+2√6)²
=25+24+20√6
=49+20√6
5ab=5(5-2√6)(5+2√6)
=5(25+10√6-10√6-24)
=5(1)
=5
a²+b² +5ab=49-20√6+49+20√6+5
=49+49+5
=103
hope it helps you......
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