Answer:
x = - 2 ±
Step-by-step explanation:
Given
x² = - 4x + 3 ( add 4x to both sides )
x² + 4x = 3
To complete the square
add (half the coefficient of the x- term)² to both sides
x² + 2(2)x + 2² = 3 + 2²
(x + 2)² = 3 + 4 = 7 ← take the square root of both sides
x + 2 = ± ← subtract 2 from both sides
x = - 2 ± ← exact values
Answer:
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Step-by-step explanation:
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She paid 10% tax and 15% tip in addition to the $60. Therefore the total will be:
$60 + $60(0.10) + $60(0.15)
= $60 + $6 + $9
= $75