Question

Срочно срочно срочно

Answer 1

1. х¹= 6 х²=-1

2. х¹=8 х²=5

3. 7x²+12x+5=0

D= 144 - 4*5*7=4

x1= (-12+4)/2*7 = -4/7

x2= (-12-4)/2*7 = -8/7

x²+4x-5=0

x¹=-5 x²= 1