Question

Solve:
(i) (x - 3)(x + 7) = 0​

Answer 1

Step-by-step explanation:

See answer in above picture

Answer 2

Step-by-step explanation:

x(x-3) +7(x-3) =0

x²-3x + 7x -21 =0

x²+4x-21=0

x²+4x=21

x²+7x-3x-21

x(x+7) -3(x+7)

(x-3)(x+7)