Question

(1 - 7x)(1 + 9x)

Answer 1

1-7x=0
-7x = -1
x = 1/7

1+9x=0
9x=-1
x=-1/9

Answer 2

Use the FOIL method. If don't know the method do a Google search

Answer 3

or 1 + 2x + -63x^2 if you're trying to expand it

Answer 4

like scarlet said, use the FOIL method

Answer 5

FOIL method can you guys explain

Answer 6

First
Outer
Inner
Last