(X+2)(X+1)= what????????

Question

does it equal 4X?

i need to be sure

plz and thankyou =]

Answer 1

FOIL

(x + 2)(x + 1)

x^2 + x + 2x + 2

x^2 + 3x + 2

Answer 2

Remember foil First Outer Inner Last

1. X*X =x^2

2. X*1 = X= X^2+X

3. 2*X= 2X =X^2+X+2X=X^2+3X

4. 2*1= 2 = X^2 + 3X +2

ans= X^2+ 3X+2

Answer 3

(x+2)(x+1)

use F.O.I.L (first, outside, inside last )

= x2+x+2x+1

=x2+3x+1

Answer 4

lets use variables: (x+ a)(x+b) = x^2 + xb + xa + ab

(x+2)(x+1) = x^2 + 1x + 2x + 2 = x^2 + 3x + 2