Question

(X+1)(X +2) is equal to? ​

Answer 1

Answer:

We can slove in two method

One type is

(x+1)(x+2)

In multiples method

x×x=x²

x×2=2x

In same way

1×x=1x

1×2=2

So we get answer like this

X²+2x+1x+2

X²+3x+2

This is the answer

Another method is formula method

(x+a)(x+b)=x²+(a+b)x+ab

Here we no that

x=x

a=1

b=2

By subtation

(x+1)(x+2)=x²+(1+2)x+(1)(2)

=x²+3x+2

This is the answer

We get same answer in both case