Brian is solving the equation x^2 -3/4 x =15. what value must be added to both sides of the equation to make the left side a per fect-square trinomial?
1 answer:
To complete the square we get the coefficient of x, divide it by 2 then square it.
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Answer:
n = 9
Step-by-step explanation:
20 + 18 + ... + 6 + 4
---------------------------
a = 20 ; d = -2 ; n = ?
--------
4 = 20 + (n-1)(-2)
-16 = (n-1)(-2)
---------
n-1 = 8
n = 9
-------
S(9) = (9/2)(20+4)
S(9) = 4.5*24
S(9) = 108
A^3
Answer:
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Step-by-step explanation:
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Answer:
x = 4 and 3
Step-by-step explanation:
[7±√(-7)²-4(1)(12)]/2
x = 4, 3
