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How to solve this sum using this identity (x+a) (x+b) = x sqaure+(a+b)x +ab que is (x-9) (x+7) . negative and postive signs are con fusing

How to solve this sum using this identity
(x+a) (x+b) = x sqaure+(a+b)x +ab
 
que is (x-9) (x+7) . negative and postive signs are con fusing

Grade:8

1 Answers

venky
235 Points
8 years ago
x sqare-2x-63

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