nakeytrag
24.06.2019 •
Mathematics
If \[x^2 - 7x + c = (x + a)^2\]for some constants $a$ and $c,$ then find $a.$
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Ответ:
9514 1404 393
a = -3.5
Step-by-step explanation:
The square expands to ...
(x +a)^2 = x^2 +2ax +a^2
That is, ...
2ax = -7x . . . . . . match x-terms
a = (-7x)/(2x) = -7/2
a = -3.5
Ответ:
1.05399x10³
Step-by-step explanation:
94.2*10= 94.2 + 8.97*107=959.79 = 1053.99 into scientific notation = 1.05399x10³