tttyson
02.11.2019 •
Mathematics
How do i solve the following (^2 means that 2 is the exponent)
7a^2-17a-3a^2+2a
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Ответ:
So add 7a^2 and -3a^2
You'll get the following sum:
4a^2
Add -17a and 2a
You'll get the following sum:
-15a
So our new problem looks like this:
4a^2 - 15a = 0
Factor out the variable "a." Leaving you with this:
We can rewrite the problem like this:
4a^2 - 15a + 0 = 0
Now we can use the quadratic equation!
Where +/- is simply the add or divide symbol. Now let's plug in our numbers!
Simplifying a bit you get the following function:
sqrt(225) = 15
15 + 15 = 30
30 / 8 = 15/4
15 - 15 = 0
0 / 8 = 0
Your two answers are:
15/4 and 0
Ответ:
The cost of three eggs is 28 cents, or $0.28