Mark is solving the equation 4x2 + 2x = -9 using the quadratic formula.
1 answer:
4x^2 + 2x = -9
4x^2 + 2x + 9 = 0
remember that the form of quadratic is ax^2 + bx + c = 0
so
a = 4
b = 2
c = 9
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Force = mass x acceleration
Force = 1,100 kg x -1.2 m/s
Force = -1320 N