plz solve 19th question....help me its urgent kindly help...
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(a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ac)
=35+2×23
=81
Taking square roots on both sides;
a+b+c=9
=35+2×23
=81
Taking square roots on both sides;
a+b+c=9
frozenelsa:
can u plz explain in detail
use the identity...
a^2+b^2+c^2 is already given so substitute it
thats ok
but i m not getting few few..
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