B Nirmala Shastry Solutions for Exercise 4: EXERCISE 4D

Evaluate:

$\frac{{\left(0.68\right)}^3-{\left(0.13\right)}^3}{{\left(0.68\right)}^2+\left(0.68\right)\left(0.13\right)+{\left(0.13\right)}^2}$

Evaluate:

$\frac{{\left(0.78\right)}^3+{\left(0.22\right)}^3}{{\left(0.78\right)}^2-\left(0.78\right)\left(0.22\right)+{\left(0.22\right)}^2}$

Factorise:

$x^4+x^3+27x+27$

Factorise:

$x^4-x^3-8x+8$

Factorise:

$8x^3+27y^3+10x+15y$

Factorise:

$x^3+125y^3+2x+10y$

Factorise:

$x^3-216y^3-3x+18y$

Factorise:

$x^3-8y^3-6x+12y$