need help with (2x - 3)(x + 3)
- Thread starter music93
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Re: help !
How would you do this: 123*546?
The standard multiplication algorithm is to multiply each piece from one by each piece from the other.
123 = 100 + 20 + 3
546 = 500 + 40 + 6
Multiplying, then
100*500 + 100*40 + 100*6 + 20*500 + 20*40 + 20*6 + 3*500 + 3*40 + 3*6
This should look familiar.
Same thing for: (2x-3)(x+3)
(2x)(x) + (2x)(3) + (-3)(x) + (-3)(3)
It's just multiplication. Don't let it scare you.
How would you do this: 123*546?
The standard multiplication algorithm is to multiply each piece from one by each piece from the other.
123 = 100 + 20 + 3
546 = 500 + 40 + 6
Multiplying, then
100*500 + 100*40 + 100*6 + 20*500 + 20*40 + 20*6 + 3*500 + 3*40 + 3*6
This should look familiar.
Same thing for: (2x-3)(x+3)
(2x)(x) + (2x)(3) + (-3)(x) + (-3)(3)
It's just multiplication. Don't let it scare you.
