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OpenStudy (anonymous):
seven less than 4 times the square of a number is 18. Find the number.
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OpenStudy (anonymous):
Well first write the equation. 4x^2-7=18 Add 7 to both sides. 4x^2-7+7 = 18 +7 4x^2 = 25 Divide all sides by 4. 4x^2/4 = 25/4 x^2=6.25 x=2.5
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