a + b=11 ab=28 a³+b³?
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Hello====
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Friends.
a=4 ,b = 7
a+b= 4+7=11.
ab= 4×7=28.
a³+b³= (a+b)(a²-ab+b²)
43+73 = (4+7) (42 -28 +72)
= 11× (16 -28 +49)
= 11× (-12+49)
= 11× 37
= 407
Thankyou..
========
========
Friends.
a=4 ,b = 7
a+b= 4+7=11.
ab= 4×7=28.
a³+b³= (a+b)(a²-ab+b²)
43+73 = (4+7) (42 -28 +72)
= 11× (16 -28 +49)
= 11× (-12+49)
= 11× 37
= 407
Thankyou..
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