Question

2. Find the product using identity: (x - 10)(x +9) ​

Answer 1

Step-by-step explanation:

(x + 9)(x – 10) = x2 + (9 – 10)x + 9 × (-10)

(x + 9)(x – 10) = x2 – x – 90

Answer 2

Answer:

(x-10) (x+9)

(10-9) (x+x)

(10-9) (2)

(-18) (2)

-18÷2

9

the x value is 9