Question

use suitable special products to find each of the following: ( x - 7 ) ( x + 9 ) ​

Answer 1

Step-by-step explanation:

Here is your ans..

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= ( x - 7 ) ( x + 9 ) [: (x+a) (x+b) = x^2 + (a+ b) x + ab]

= x^2 + ( -7 + 9 ) x + (-7 ) × 9

= x^2 + 2 x - 63 ans..

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Answer 2

Answer:

[(x-a) (x+b) =x^2-ax+bx-ab].

(x-7)(x+9) =x^2-7x+9x-63

=> x^2+2x-63.