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Factorise a quadratic equation of the form $x^2+bx+c$ with two positive roots

Factorise a quadratic equations of the form $x^2+bx+c$ with 2 negative roots.

Factorising without powers

Factorise an expression of the form $ax^n+bx^m$.

Factorise an expression of the form $ax+bxy$ for variables $x$ and $y$.

Factorise an expression of the form $ax+bx^2$.

Factorise an expression of the form $-ax-b$ for numbers $a,b$

Factorise an expression of the form $-ax-b$ for numbers $a,b$

Selection of questions on substituting values into simple expressions

Substituting a values of $x$ and $z$ into $\frac{ax+bz}{c}$