Question
Factorise:
$80-5 a^2$
$80-5 a^2$
✓
Answer
5(4 + a) (4 - a)
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Similar questions
Using the standard formulae, expand:
$\left(\frac{x}{3}+\frac{6}{x}\right)^2$
→$\left(\frac{x}{3}+\frac{6}{x}\right)^2$
Expand:
$\left(\frac{1}{2} x-\frac{2}{3} y\right)^3$
→$\left(\frac{1}{2} x-\frac{2}{3} y\right)^3$
Find the median of:
10, 75, 3, 15, 9, 47, 12, 48, 4, 81, 17, 27
10, 75, 3, 15, 9, 47, 12, 48, 4, 81, 17, 27
Show that is irrational:
$(3-\sqrt{3})^2$
→$(3-\sqrt{3})^2$
Without doing any actual division $, $ find which of the following rational numbers have terminating decimal representation : $\frac{7}{16}$
→The dimensions of a metallic cuboid are 100 cm. 80 cm 64 cm. It is melted and recast into a cube. Find
(i) the edge of the cube,
(ii) the surface area of the cube.
(i) the edge of the cube,
(ii) the surface area of the cube.
Show that $x$ is irrational, if $x^2 = 0.009.$
→In the given figure, ABCD is a square, $EF \| BD$ and R is the mid-point of EF.
Prove that:
(i) $BE = DF$
(ii) AR bisects $\angle BAD$
(iii) If AR is produced, it will pass through C .
→Prove that:
(i) $BE = DF$
(ii) AR bisects $\angle BAD$
(iii) If AR is produced, it will pass through C .
Factorise:
$a^3-125-2 a+10$
→$a^3-125-2 a+10$
Factorise:
$24 x^4-375 x$
→$24 x^4-375 x$