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(x+5)/2=-2(x-5) -> x/2 +5/2= -2x +10 -> 2,5x = 7,5 -> x=3
P=1/2ah+a^2 -> P= a(1/2h + a) -> P/a - a =1/2h -> h= 2P/a - 2a
a). P=(a+b)*h/2
(a+b)*h=2P
(a+b)=2P/h
a=2P/h -b
b) s=V₀ *t+at^2/2
at^2/2=s-V₀ *t
at^2=2s-2V₀ *t
a=(2s)/t²-2V₀/t
-2,5x=-7,5 /(-2,5)
2=3
b)1/2x - 5/2 = -2x + 10
1/2x + 2x = 10+ 5/2
2.5x = 12,5 /2,5
x = 5
2a)
(a+b)*h= 2P
(a+b)= 2P/h
a= 2P/h -b
b)s=V0male *t+at^2/2
at^2/2= s-V0male* t
at^2= (s-V0male* t)*2
a= [(s-V0male* t)*2]/t^2