Michael C.

asked • 02/21/19

Use the quadratic formula to solve x^2+6x-7.

Show ALL work to receive FULL credit. Then describe the solution.

1 Expert Answer

By:

William W. answered • 02/21/19

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Michael C.

I don't think I did it right can I see it step by step?
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02/21/19

William W.

x = (-b +/- sqrt(b2 - 4ac))/2a and a = 1, b = 6, and c = -7 so: Step 1: x = (-6 +/- sqrt(6^2 - 4(1)(-7)))/2(1) Step 2: x = (-6 +/- sqrt(36 - -28))/2 Step 3: x = (-6 +/- sqrt(36 +28))/2 Step 4: x = (-6 +/- sqrt(64))/2 Step 5: x = (-6 +/- 8)/2 Breaking the +/- into two pieces: Step 6: x = (-6 + 8)/2 and x = (-6 - 8)/2 Step 7: x = 2/2 = 1 and x = -14/2 = -7
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02/21/19

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