Answered

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Solve the equation
2x2+ 8x - 1 = 0
by completing the square
Give your answers correct to 2 decimal places.

Sagot :

4599307156

Answer: The answer comes out with three but you can take off the 5 i suppose.

-0.375

Step-by-step explanation:

2x2+8x-1=0

Step 1: Multiple: 2x2=4      /   4+8x-1=0

Step 2: Combine like terms: 4+(-1)=3    /     3+8x=0

Step 3: Subtract 3 from both sides: 3-3=0 and 0-3=-3  /      8x=-3

Step 4: Divide both sides by 8: 8x/8   -3/8=-0.375

Step 5: -0.375

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