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Grade 1010 grade maths

please solve this question...............................................

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Profile image of naresh
8 Years agoGrade 10
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1 Answer

Profile image of Malay Damani
8 Years ago
a+ib=x3  + i3y3+3xiy(x+iy)
a+ib=x3-iy3+3x2iy-3xy2i2
a+ib=x3-iy3+3x2iy-3xy2
a=x3-3xy2
a/x=x2-3y2
b=-y3+3x2y
b/y=-y2+3x2
a/x+b/y=4x2-4y2.
hence proved