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Earn +20 ptsQ: Solve x2 - 4x - 9 equals 0 by completing the square?
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How do you solve 6 - 4x equals 54?
-12 (?)
Solve for y 4x-y equals 7?
-3
How do you solve -4x-4 equals -16?
-4x-4 equals -16. Add 4 to both sides; -4x equals -12. Divide both sides by -4; x equals 3.
How do you solve y equals 4x-8 and y equals 2x plus 10?
y=4x-8y=2x+10Substitute (4x-8) for y in the second equation and solve for x:4x-8=2x+102x=18x=9Now solve for y:y=4(9)-8=28(9,28)
Can you solve x squared minus 4x minus 2 equals 0?
Yes and x = 2+square root of 6 or x = 2-square root of 6
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