Question

(x+a)(x-b) is equal to

A.x²-(a+b)x+ab
B.x²+(a+b)x-ab
C.x²+(a-b)x-ab
D.x²+(a-b)x+ab​

Answer 1

Answer:

Factorizingx

2

−(a+b)x+ab,

=x

2

−ax−bx+ab,

=x(x−a)−b(x−a)

=(x−a)(x−b)

Answer 2

Answer:

The first term of both multinomials is same. So, they are special binomials. Therefore, the product of them can be called as the special binomials product and it is written in mathematical form as follows. The product of the special polynomials and is equal to an algebraic expression x 2 + ( a − b ) x − a b .