Question

Решите уравнения

1. (2x+3)*(4-x)=0

2. (5x-8)*(3x+10)=0

3. (4x+14)*(7-2x)=0

Answer 1

1. (2x+3)*(4-x)=0

2х+3=0 или 4-х=0

2х=-3            -х=-4

х=-1,5             х=4

2. (5x-8)*(3x+10)=0

5х-8=0 или 3х+10=0

5х=8             3х=-10

х=1,6              х=-10/3

3. (4x+14)*(7-2x)=0

4х+14=0 или 7-2х=0

4х=-14          -2х=-7

х=-3,5              х=3,5