Question
Factorise:
9x2 - 3x - 20
9x2 - 3x - 20
✓
Answer
9x2 - 3x - 20
= 9x2 - 15x + 12x - 20
= 3x(3x - 5) + 4(3x - 5)
= (3x - 5)(3x + 4)
= 9x2 - 15x + 12x - 20
= 3x(3x - 5) + 4(3x - 5)
= (3x - 5)(3x + 4)
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
hemispherical bowl is made of steel 0.25cm thick. The inside radius of the bowl is 5cm. Find the volume of steel used in making the bowl.
Find the following product:
$\Big(\frac{\text{x}}{2}+2\text{y}\Big)\Big(\frac{\text{x}^2}{4}-\text{xy}+4\text{y}^2\Big)$
→$\Big(\frac{\text{x}}{2}+2\text{y}\Big)\Big(\frac{\text{x}^2}{4}-\text{xy}+4\text{y}^2\Big)$
Find a rational number between 1.3 and 1.4
Find the value of $(1296)^{0.17}\times(1296)^{0.08}.$
→Factorise:
1 - 27a3
1 - 27a3
Simplify: $\sqrt{3-2\sqrt2}.$
→Write (3a + 4b)3 in the expanded form.
In the figure given below, state which lines are parallel and why?
Find the following products:
(7p4 + q)(49p8 - 7p4q + q2)
(7p4 + q)(49p8 - 7p4q + q2)
Multiply:
$6\sqrt{15}$ by $4\sqrt{3}$
→$6\sqrt{15}$ by $4\sqrt{3}$