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Solve for x In the equation x2 - 12x+ 36 = 90
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44 votes
44 votes
Solve for x In the equation x2 - 12x+ 36 = 90

User Wolfgang
by
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1 Answer

6 votes
6 votes

Answer:

x ≈ 15.49 or -3.49

Explanation:

x² - 12x + 36 = 90

x² - 12x - 54 = 0

Quadratic formula:

( -b ± √b² - 4ac ) / 2a

=

( 12 ± √144 + 216 ) / 2

= (12 ± 18.97) / 2

(12 + 18.97) / 2 = 30.97 /2 ≈ 15.49

(12 - 18.97) / 2 = -6.97 / 2 ≈ -3.49

User Efren
by
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