(a)[1]
From $k^x \times k^5 = k^{20}$, determine the value of x.
(b)[2]
Expand the product and simplify $(x+5)(x-4)$.
(c)[2]
Factorise the expression $21r^3-7r$.
Mathematics 0580 · IGCSE · Algebraic manipulation
Mathematics 0580 · IGCSE · Algebraic manipulation
From $k^x \times k^5 = k^{20}$, determine the value of x.
Expand the product and simplify $(x+5)(x-4)$.
Factorise the expression $21r^3-7r$.