Question

Упростите сумму или разность

Answer 1

$75. \ \frac{15a^2}{3a-2} - 5a = \frac{15a^2-5a \cdot (3a-2)}{3a-2} = \frac{15a^2-15a^2 +10a}{3a-2} = \frac{10a}{3a-2} \\ \\ 76. \ \frac{6c^2}{3+2c}-3c=\frac{6c^2-3c \cdot (3+2c) }{3+2c}=\frac{6c^2 -9c-6c^2 }{3+2c}=-\frac{9c}{3+2c} \\ \\ 77. \ \frac{2y^2}{y-8}-2y=\frac{2y^2 -2y \cdot (y-8)}{y-8}=\frac{2y^2 -2y^2 +16y}{y-8}=\frac{16y}{y-8}$