Question

please answer this question itsits urgent please step by step explanation and I write this answer in my examination so you can understand I catch my marks so the answer of this question as -11 x + 31I don't know this method so please can you help me​

Answer 1

Step-by-step explanation:

let the number to be added be k

(x+7)(x-3)+k=(x-5)(x-2)

⇒(x²+7x-3x-21)+k=(x²-5x-2x+10)

⇒k=-7x-4x+10+21

⇒k= -11x+31