סוג : 3 משוואות+שלבים.
t v = 150 ↓ t = 150 V {\displaystyle {\begin{aligned}&tv=150\\&\downarrow \\&\color {blue}t={\frac {150}{V}}\\\end{aligned}}}
2 v + 3 a = 150 ↓ v = 150 − 3 a 2 {\displaystyle {\begin{aligned}&2v+3a=150\\&\downarrow \\&\color {blue}v={\frac {150-3a}{2}}\\\end{aligned}}}
( 2 t − 3 2 ) a = 150 t = 150 V ↓ [ 2 ∗ 150 v − 3 ] a = 300 [ 300 v − 3 ] a = 300 v = 150 − 3 a 2 ↓ [ 2 ∗ 300 150 − 3 a − 3 ] a = 300 [ 200 50 − a − 3 ] a = 300 [ 200 − 3 ( 50 − a ) ] a = 300 ( 50 − a ) ( 200 − 150 + 3 a ) a = 15 , 000 − 300 a 50 a + 3 a 2 − 15 , 000 + 300 s = 0 3 a 2 + 350 a − 15 , 000 = 0 a = 3 ; b = 350 ; c = − 15 , 000 − 350 ± 350 2 + 4 ∗ 3 ∗ 15 , 000 2 ∗ 3 a = 33 1 3 ; a = − ↓ v = 150 − 3 ∗ 33 1 3 2 = 25 k m h r {\displaystyle {\begin{aligned}&({\frac {2t-3}{2}})a=150\\&\color {blue}t={\frac {150}{V}}\\&\downarrow \\&[2*{\frac {150}{v}}-3]a=300\\&[{\frac {300}{v}}-3]a=300\\&\color {blue}v={\frac {150-3a}{2}}\\&\downarrow \\&[{\frac {2*300}{150-3a}}-3]a=300\\&[{\frac {200}{50-a}}-3]a=300\\&[200-3(50-a)]a=300(50-a)\\&(200-150+3a)a=15,000-300a\\&50a+3a^{2}-15,000+300s=0\\&3a^{2}+350a-15,000=0\\&a=3;b=350;c=-15,000\\&{\frac {-350\pm {\sqrt {350^{2}+4*3*15,000}}}{2*3}}\\&a=33{\frac {1}{3}};a=-\\&\downarrow \\&v={\frac {150-3*33{\frac {1}{3}}}{2}}=25{\frac {km}{hr}}\\\end{aligned}}}
![{\displaystyle {\begin{aligned}&({\frac {2t-3}{2}})a=150\\&\color {blue}t={\frac {150}{V}}\\&\downarrow \\&[2*{\frac {150}{v}}-3]a=300\\&[{\frac {300}{v}}-3]a=300\\&\color {blue}v={\frac {150-3a}{2}}\\&\downarrow \\&[{\frac {2*300}{150-3a}}-3]a=300\\&[{\frac {200}{50-a}}-3]a=300\\&[200-3(50-a)]a=300(50-a)\\&(200-150+3a)a=15,000-300a\\&50a+3a^{2}-15,000+300s=0\\&3a^{2}+350a-15,000=0\\&a=3;b=350;c=-15,000\\&{\frac {-350\pm {\sqrt {350^{2}+4*3*15,000}}}{2*3}}\\&a=33{\frac {1}{3}};a=-\\&\downarrow \\&v={\frac {150-3*33{\frac {1}{3}}}{2}}=25{\frac {km}{hr}}\\\end{aligned}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/cfbd88fb90a82b91b6e19e44831acec45e368fd7)
