Question

(1 - 7x)(1 + 9x) need help solving useing the foil method can anyone help me plz i have to have this done today

Answer 1

(a + b)(a + b) = a(a + b) + b(a + b) = a^2 + ab + ab + b^2 = a^2 + 2ab + b^2

Answer 2

(2x + 4) (x + 5) = 2x(x + 5) + 4(x + 5) = 2x^2 + 10x + 4x + 25 = 2x^2 + 14x + 25

Answer 3

that is so confusing

Answer 4

thats not even my problem

Answer 5

I know. It's an example

Answer 6

Which is exactly what you need. You need to do the actual problem yourself

Answer 7

FOIL method.....
First, outside, inside, last....
(1 - 7x)(1 + 9x)

Lets take the First numbers...and multiply...
1 x 1 = 1
now take the outside numbers ...
1 x 9x = 9x
now take the inside numbers...
(7x) x 1 = 7x
now take the last numbers...
(7x) x 9x = 63x^2

Now lets put it all together....
1 + 9x + 7x + 63x^2 (combine like terms)
1 + 16x + 63x^2

lets write it like this...
63x^2 + 16x + 1

Answer 8

i have examples but i dont under stand them im doing online work for school so i need help going through it step by step its not easy trying to do all this on your own when u havnt realy done it before

Answer 9

Have you seen this before?
a(b + c) = ab + ac

That's distributive rule

Answer 10

what problems do u need help with

Answer 11

Distributive Rule and FOIL are the same method. The only difference is, distributive rule is an actual property of real numbers. FOIL is an acronym.

Answer 12

the next prob is worse then this one
(3m^3 -1/2 y)(3m^3 -1/2 y)

Answer 13

Not really. It's the same method, just with higher degree terms.

Answer 14

but see i dont understand it at all can u help me sep by step to solve this i have no teacher and theres no one here who understands

Answer 15

There's another method you might understand.