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2 answers:
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Answer:
x = -1 +/-2i
Step-by-step explanation:
Write the equation in standard form to find the roots, also known as the solutions, zeros, or x-intercepts, of the quadratic.
x² + 2x + 5 = 0
Use the quadratic formula by substituting a= 1, b = 2 and c = 5.
The final price inculding tax after discount is $ 47 and expression used is:
Required expression = price of item - discount price + tax on item
<h3><u>Solution:</u></h3>Given that 40% discount on an item costing $74 plus 7% tax
So cost of item = $ 74
Tax = 7 %
Discount = 40 %
The expression which can be used to find price after discount including tax is:
Required expression = price of item - discount price + tax on item
Let us first find the price after discount
Price after discount = cost of item - 40 % of cost of item
Price after discount = 74 - 40 % of 74
Thus the price after discount is approximately $ 44
<em><u>Now tax is 7 % which means 7 % of $ 44</u></em>
Price including tax = 44 + 7 % of 44
Price including tax =
Thus the final price inculding tax after discount is $ 47