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17 votes
17 votes
What are the two equations for 2x2−6x−9=0

User Prvit
by
3.1k points

1 Answer

22 votes
22 votes

Answer:


x=(3\left(1+√(3)\right))/(2),\:x=(3\left(1-√(3)\right))/(2)

Explanation:


x_(1,\:2)=(-\left(-6\right)\pm √(\left(-6\right)^2-4\cdot \:2\left(-9\right)))/(2\cdot \:2) < - InsertQuadraticFormula

x_(1,\:2)=(-\left(-6\right)\pm \:6√(3))/(2\cdot \:2)

x_1=(-\left(-6\right)+6√(3))/(2\cdot \:2),\:x_2=(-\left(-6\right)-6√(3))/(2\cdot \:2) < - Separate THE Solutions

x=(3\left(1+√(3)\right))/(2),\:x=(3\left(1-√(3)\right))/(2)

User Jvf
by
2.9k points
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