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| Math Central | Quandaries & Queries |
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Question from John, a student: I'm usually good at math but once i got to high school everything went blank for me. i am |
Hi John,
According to BEDMAS you first look inside the brackets at
22 / 2-3x2
The only exponential expression is x2 which you can't simplify any further so move on to division. 22/2 = 11 so the expression becomes
6 + 4[11 - 3x2]
There is no further simplification to make inside the brackets and looking at the expression in totality the first operation to perform is multiplication by 4. Using the distributive law
6 + 4[11 - 3x2] = 6 + 4 × 11 - 4 × 3x2 = 6 + 44 - 12 x2
All that remains is to add 6 and 44
6 + 4[11 - 3x2] = 6 + 4 × 11 - 4 × 3x2 = 6 + 44 - 12 x2 = 50 - 12 x2
I hope this helps,
Penny
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