If m2+ n2+p2= 58 and mn + np + pm = 21. Find the value of m + n + p
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m+n+p = 9...(1)
m²+n²+p²= 41....
(mn+np+pm) = ❓
Now,
we know
(x+y+z)²= (x2+y²+z²+)+2(xy+yz+zx)
like thats ,
(m+n+p)²= (m²+n²+p²)+2(mn+np+pm)
keep value by (1) and (2)
(9)²= (41)+2(mn+np+pm)
=>2(mn+np+pm)= 81 - 41
=>(mn+np+pm) = 40/2
=>(mn+np+pm)= 20
✏Hopes its help's u
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2
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!! upar wala ans shi he...!!!!
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