Question

plese answer the question fast its very urgent​

Answer 1

Answer:

Please mark me Brainlist

Answer 2

Answer:

x^2+10x+9=0

x^2+9x+x+9=0

x(x+9)+1(x+9)=0

x+1=0 or x+9=0

x=-1 or x=-9

x^2-8x+7=0

x^2-7x-x+7=0

x(x-7)-1(x-7)=0

x-1=0 or x-7=0

x=1 or x=7

question 3 and 4 based on same process