Multiply the binomials
$(2.5 l - 0.5 m)$ and $(2.5 l + 0.5 m)$

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Solution

$(2.5 l - 0.5 m) (2.5 l + 0.5 m)$ is of the form $(a - b) (a + b) = a^{2} - b^{2}$
$= {(2.5 l)}^{2} - {(0.5 m)}^{2}$
$= 6.25 ‬ l^{2} - 0.25 ‬ m^{2}$

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Question 1(iii)
Multiply the binomials:
(2.5l-0.5m) and ( 2.5l+0.5m)

N a O H

N a O H

2.5 $\times \frac{80}{0.5}$ = ?

l = 3.5

b = 2.5

h = 1.5

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