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How To Solve 2x2 + 3x - 20 = 0?

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2 Answers

Melody Adams Profile
Melody Adams answered
Did you mean
2x2 + 3x - 20 = 0
(2x - 5)(x + 4) = 0
2x - 5 = 0   x + 4 = 0
     2x = 5   x = -4
    x = 5/2  

x = 5/2 & -4
William Atkins Profile
William Atkins answered
2*2 + 3x - 20 = 0
4 + 3x - 20 = 0
3x - 20 = -4
3x = 16
x = 5-1/3

Proof:

4 + 3 (5-1/3) - 20 = 0
4 + (16) - 20 = 0
20 - 20 = 0

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