Question

Multiply: (x + 1)(x - 2).

Answer 1

\[x(x-2)+1(x-2)\]

Answer 2

I use the distributive property twice

Answer 3

now you do it twice again

Answer 4

Each value in each group should be multiplied by each value in the other group:
\[(x \times x) + (x \times -2) + (1 \times x) + (1 \times -1)\]

Answer 5

I think it's x^2 - 2x - 2

Answer 6

\[-2x+1x=(-2+1)x \neq -2x\]

Answer 7

What?

Answer 8

(-2+1) is not -2

Answer 9

x^2-2

Answer 10

\[x(x-2)+1(x-2)=(x^2-2x)+(x-2)=x^2+x(-2+1)-2\]

Answer 11

2x-2

Answer 12

You can use the FOIL method
(x + 1)(x - 2)
Use the FOIL method to get the product
F = Multiply the First numbers x * x = x^2
O= Multiply the Outer numbers x * -2 = -2x
I = Multiply the Inner numbers 1 * x = x
L = Multiply the Last numbers 1 * -2 = -2

Now put it together
x^2 - 2x +x -2

Combine like terms
x^2 - x -2

Answer 13

Thanks! :)