lindselu
14.02.2020 •
Mathematics
Diagnostic Pre Test
TEST
Active
The square of a number is 12 less than 7 times the number. What is the number?
• 4 or-3
0 -4 or 3
0 -3 or 4
3 or 4
Solved
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Ответ:
We can make this:
x^2=7x-12
This becomes:
x^2-7x+12=0
Factored form:
(x-4)(x-3)=0
The numbers are either 4 or 3, so D is correct
Hope this helped!
Ответ:
c^2 = a^2 + b^2
c^2 = 9+16
c^2 = 25
c = √25
c = 5