Question

9х² - (х+3) (х-3)= 6х+11

Answer 1

9х²-(х+3)(х-3) = 6х+11

9х²-х²+9 = 6х+11

8х²-6х-2 = 0

D = 100

X1 = 1

X2 = -0,25

Answer 2

Ответ:9x²-x²-3x+3x-9=6x+11

9x²-x²-3x+3x-6x=11+9

8x²-6x=20

2x(4x-3)=20

2x=20 или 4x-3=20

x=10 4x=17

x=4 1/17

Объяснение: