Question 180535
Practice doing it this way, and you'll catch on:
Suppose I have
{{{13*41 = 533}}}
Now I'll separate the number into 2 factors, let's say
{{{(9 + 4)(25 + 16)}}}
I believe FOIL stands for first-outer-inner-last
Following this, I get
{{{(9 + 4)(25 + 16) = 9*25 + 9*16 + 4*25 + 4*16}}}
{{{(9 + 4)(25 + 16) = 225 + 144 + 100 + 64}}}
{{{(9 + 4)(25 + 16) = 533}}}
Try a simpler one, like
{{{5*11 = 55}}}
{{{5*11 = (3 + 2)(7 + 4)}}}
{{{(3 + 2)(7 + 4) = 3*7 + 3*4 + 2*7 + 2*4}}}
{{{(3 + 2)(7 + 4) = 21 + 12 + 14 + 8}}}
{{{(3 + 2)(7 + 4) = 55}}}
After practice this way, you can put in x's and
y's anywhere you like, and you'll get correct
answers