Question

PLEASE DO THIS QUESTION
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Answer 1

( 2.8)^3 -( 1.8)^3) / 2.8)^2 + 1.8)^2 + 2× 2.8 × 1.8 - 2.8 × 1.8

As a^3 - b^3 = ( a- b)( a^2 + ab + b^2)

So ( 2.8 -1.8) ( 2.8^2 + 2.8× 1.8 + 1.8^2)/ ( 2.8^2 + 1.8^2 + 2.8× 1.8))

Divide N and D by ( 2.8^2 + 2.8× 1.8 + 1.8^2)

So its left only ( 2.8-1.8) = 1

Answer 1

Answer 2

Hope this will help u... :-)