Question

If a+b=11,ab=28 find value of a³+b³

Answer 1

Hope this helps u..

Answer 2

Let a=4 ,b = 7

then 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