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When the equation is of the form
... ax² +bx +c = 0
the discriminant is
... d = b² -4ac
Here, your equation is in the appropriate form, so we can identify
... a = -1, b = 4, c = -2
and calculate the discriminant as
... d = 4² - 4(-1)(-2) = 16 - 8 = 8
The discriminant is 8.
Answer:
Step-by-step explanation:
the expression for the perimeter would be
2(x) + 2(2x+7)
which can be simplified to 2x+4x+14
which equals 6x+14
