0
3x^2 + 7 x =20
3x^2 + 7x - 20 = 0
3(-4)^2 + 7(-4) -20
3(16) -28 -20
48-28-20 = 0
(-4)
3x^2 + 7x =20
3(1.666)^2 + 7(1.666) -20 =0
3(2.78) + 11.66 - 20 =0
8.34 + 11.66 - 20 = 0
(1.666 or 5/3) answers (-4, 5/3)
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