Anonymous
Anonymous asked in Science & MathematicsMathematics · 2 months ago

# Can you use PEMDAS instead of the distributive law so it's faster to solve?

For example,

4(8-2)

Can you just do 4 * 6 instead of

4 * 8 - 4 * 2?

The answers are the same, but will it work even if some of the numbers are negative, or fractions, etc?

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• ted s
Lv 7
2 months ago

with number symbols yes....but what about 2 ( x - y² + z ) = ????....where x , y , and z are numbers

• Como
Lv 7
2 months ago

Use whatever you feel comfortable with.

• 2 months ago

Yes, that's known as the distributive property.

• D g
Lv 7
2 months ago

that is how you do it  anyway only a moron would expand it first by multiplying through

• 2 months ago

oh yeah, it will work for all of those things. Either way works! It's really just preference with problems like that. I would simplify that 8-2 first, for example.

• Jim
Lv 7
2 months ago

You do according to PEMDAS for like items

or use distributive for unlike items.

BOTH give the same answers otherwise it would break the law!

• 2 months ago

Yes, PEMDAS will work with this to solve it.

• 2 months ago

4(8 - 2)

You can just do 4 * 6 instead of

4 * 8 - 4 * 2

The answers are the same, but it will work even

if some of the numbers are negative, or fractions, etc.

• david
Lv 7
2 months ago

given numbers at every place in the math problem, PEMDAS is actually preferred.  When a problem has variables then algebraic properties like the distributive prop. has to be used.