Wzór
[tex] \frac{(a + b) \times h}{2} [/tex]
Dane
[tex]a = \underline {m} \\ b = \underline {m - 8} \\ h = \underline {m + 2}[/tex]
Obliczmy
[tex] \frac{(m + m - 8) \times (m + 2)}{2} = \frac{(2m - 8)(m + 2)}{2} = \frac{2 {m}^{2} + 4m - 8m - 16 }{2} = \frac{ {2m}^{2} - 4m - 16 }{2} =[/tex]
[tex] {\boxed{ \boxed{ \bold{ {m}^{2} - 2m - 8}}}}[/tex]
