Proszę o pomoc w tych dwóch przykładach bo nie umiem sobie z nimi poradzić :( zadanie.-z podanego wzoru wyznacz podaną wielkość. a) d=b/a^2-ab+1 (b) b) z=5ab^2/2-6(ab-1) (a)
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a)
d = b/(a² - ab + 1)
d(a² - ab + 1) = b
da² - dab + d = b
-dab - b = -da² - d
-b(da + 1) = -d(a² + 1)
b(da + 1) = d(a² + 1)
b = d(a² + 1)/(da + 1)
b)
z = 5ab²/2 - 6(ab - 1)
z[2 - 6(ab - 1)] = 5ab²
z[2 - 6ab + 6] = 5ab²
2z - 6abz + 6z = 5ab²
-6abz - 5ab² = - 2z - 6z
-a(6bz + 5b²) = - 8z
a(6bz + 5b²) = 8z
a = 8z/(6bz + 5b²) = 8z/b(6z + 5b)