Using both of the -7’s: -7+-7=-14
Answer:
One as a percent is 0.01%
X^2-2x -3 =0
a =1 b =-2 and c = -3
x = - (-2) +/- sqrt (-2)^2 - 4(1)(-3)
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2(1)
x = + 2 +/- sqrt [(4) - 4(-3)]
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2
x = +2 +/- sqrt [4 + 12]
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2
x = +2 +/- sqrt[16]
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2
x = +2 +/- (4)
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2
x = 2 + 4 or 2 -4
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2 2
x = 6/2 or -2/2
x = 3 or x = -1
Answer:
There are infinite possibilities for x
Step-by-step explanation:
5 + 3x = 3x + 5
-5 -5
3x = 3x
÷3 ÷3
x = x
Therefore, you can put any replacement to x, and the equation would be true.
Answer:
(2 n + 1) (n + 7)
Step-by-step explanation:
Factor the following:
2 n^2 + 15 n + 7
Factor the quadratic 2 n^2 + 15 n + 7. The coefficient of n^2 is 2 and the constant term is 7. The product of 2 and 7 is 14. The factors of 14 which sum to 15 are 1 and 14. So 2 n^2 + 15 n + 7 = 2 n^2 + 14 n + n + 7 = 7 (2 n + 1) + n (2 n + 1):
7 (2 n + 1) + n (2 n + 1)
Factor 2 n + 1 from 7 (2 n + 1) + n (2 n + 1):
Answer: (2 n + 1) (n + 7)