Question

5:
(x - 1) (x + 1) = 9
(x + 2) (x - 1) = 10​

Answer 1

Mark as branlist answer

Answer 2

Answer:

(x-1)(x+1) = 9

Formula=a²-b²

so, x²-1² = 9

x²-1= 9

x²=9+1

x²=10

(x+2)(x-1)=10

x+2+x-1=10

2x+1=10

2x=10-1

2x=9

x=9/2