Question

please answer for this question​

Answer 1

Step-by-step explanation:

7) x²-8x-9

x²-9x+x-9=0

x=9

x=-1

8) x²-9x+2x-18=0

x=9

x=-2

9) x²+8x+x+8=0

x=-8

x=-1

10) x2-8x-x+8=0

x=8

x=1

11) x²-9x+x-9=0

x=9

x=-1

12) x²+7x+4x+28=0

x=-7

x=-4