F(x) = -7x^2+8x+2 what is the value of the discriminant of f
2 answers:
Answer:
120
Step-by-step explanation:
The discriminant can be written as an expression: b² - 4ac.
We know that a = -7, b = 8, c = 2, since the function f(x) = -7x² + 8x + 2 is in standard form: ax² + bx + 2.
Now let's evaluate the discriminant:
b² - 4ac
= 8² - 4(-7)(2) (Simplify)
= 64 - 4(-14)
= 64 + 56
= 120
Answer:
D = 120, there are 2 real roots for F(x)
Step-by-step explanatU
using the
formula D = b^2 - 4ac for discriminant
D = 8^2 - 4*(-7)*2
D = 64 + 56 = 120
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