Karen Morrison and Nick Hamshaw Solutions for Exercise 5: Exercise 2.5

Remove the brackets and expand the expression: $4x{y}^2\left(3-2x\right)$

Remove the brackets and expand the expression: $3x{y}^2\left(x+y\right)$

Remove the brackets and expand the expression: $x^{2}y\left(2x+y\right)$

Remove the brackets and expand the expression: $9x^2\left(9-2x\right)$

Remove the brackets and expand the expression: $4x{y}^2\left(3-x\right)$

Given the formula for area, $A=\mathrm{length}\times \mathrm{breadth}$, write an expression for $A$ in terms of $x$ for the following rectangle. Expand the expression to give $A$ in simplest terms.

Given the formula for area, $A=\mathrm{length}\times \mathrm{breadth}$, write an expression for $A$ in terms of $x$ for the following rectangle. Expand the expression to give $A$ in simplest terms.

Given the formula for area, $A=\mathrm{length}\times \mathrm{breadth}$, write an expression for $A$ in terms of $x$ for the following rectangle. Expand the expression to give $A$ in simplest terms.