If p+q=12 and pq=22, thenfind p2 + q2
Answers
Answered by
5
p2+q2=(p+q) 2-2pq
=(12) 2 - 2(22)
=144-44
=100
I hope its helpful....
=(12) 2 - 2(22)
=144-44
=100
I hope its helpful....
docseven33:
Which identity is applied here.
(p+q) 2 this is applied here
From where -2pq came.
(p+q) 2 =p2+q2+2pq
so if we take it this side than p2+q2=(p+q) 2-2pq
Answered by
1
PQ=22
P+Q=12
(p+Q)^2=12^2=144
so using identitiy
a ^2+b^2+2ab=(a+b)^2
=p^2+q^2+2pq
=p^2+q^2+44=144
p^2+q^=144-44=100
=p^2+q^2=100
thanks
P+Q=12
(p+Q)^2=12^2=144
so using identitiy
a ^2+b^2+2ab=(a+b)^2
=p^2+q^2+2pq
=p^2+q^2+44=144
p^2+q^=144-44=100
=p^2+q^2=100
thanks
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