Question

please help me to solve 14 No. question ...

Answer 1

hey mate here is your answer

Step by step explanation :- (x+y+z)^2=x^2+y^2+z^2+2(xy+yz+zx)

(15)^2= 83 +2(xy+yz+zx)

225-83=2(xy+yz+zx)

152/2=xy+yz+zx

xy+yz+zx=76

x^3+y^+z^3-3xyz=(x+y+z) (x^2+y^2+z^2-(xy+yz+zx)

x^3+y3+z3= 15× 7

=105

it will surely help you.

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