Mathematics
jktibbs
30

Write the quadratic equation in general form. What is the value of b2 - 4ac? 1 = 2x2 + 7x

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(1) Answers
BrindaHolstine

If 1 = 2x²  +  7x  then 2x²  +  7x  -  1  =  0 From that equation, b = 7, a = 2  and c = - 1 ∴ b² - 4ac  =  (7)²  - 4 (2) (-1)                  = 49 + 8                  =  57 ∴  The equation has two real roots

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