Question

(i) (x+1)(x+3) - x(x+2) =15​

Answer 1

Explanation:

x²+4x+3-x²-2x=15

2x=12

x=6 OK friend

Answer 2

Explanation:

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=> ( x + 1 ) ( x + 3 ) - x ( x + 2 ) = 15

=> x ( x + 3 ) +1 ( x + 3 ) - x ^2 - 2x = 15

=> x ^2 + 3x + x + 3 - x ^2 - 2x = 15

=> 2x + 3 = 15

=> 2x = 15 - 3

=> 2x = 12

=> x = 6