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Hong Kong
Stage 4 - Stage 5

Difference of two squares

Interactive practice questions

Answer the following.


Expand $\left(x+5\right)\left(x-5\right)$(x+5)(x5).


Hence factorise $x^2-25$x225.

Approx a minute

Which positive integer must go in the spaces to make the statement true?

What expression must go in the space to make the statement true?

One linear factor of $x^2-49$x249 is $x+7$x+7. What is the other factor?

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