Question

сократите дроби: 35x^5  y^7 z^2/ 21x^3 y8 z2    -14a^2-7ab /b^2-4a^2

Answer 1

$frac{35 x^{5} y^{7} z^{2} }{21 x^{3} y^{8} z^{2} } = frac{5 x^{2} }{3y}$

$frac{-14a^{2}-7ab }{b ^{2}-4a ^{2} } = frac{-7a(2a+b)}{(b-2a)(b+2a)} = frac{-7a}{b-2a}$