When multiplying x+a and x+b, we get x2+(a+b)x+ab.
Can you imitate the case of the identity (x + a) (x + b) = x2 + (a + b) x + ab, and get a similar expression for the product (x + a) (x + b) (x + c)?
(x+a)(x+b)=x2 + (a+b)x +ab. Evaluate 99×106 without multiplying directly.
When 81 is multiplied by a positive integer X, we get a perfect cube, then the value of X is: