andrewjammo
19.03.2021 •
Mathematics
Write an equivalent expression without parentheses and then simplify the result
8n - (7 + 6n)
A. 8n - 7 - 6n
B. 8n - 7 + 6n
C. 2n +7
D. -2n + 7
E. 2n - 7
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Ответ:
Ответ:
Ответ:
x = [-b +- sq root(b^2 -4*a*c)] / 2*a
x = [-9 +- sq root (81 -40) ] / 2
x = -9 /2 + sq root (41) / 2
x = -4.5 + 3.202
= -1.298
x = -4.5 - 3.202
= -7.702
answer is B