Louisa wants to buy an online movie subscription that is on sale for 15% off. She writes the expression c − 0.15c to represent t
1 answer:
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9514 1404 393
Answer:
True
Step-by-step explanation:
We assume your equation is intended to be ...
The usual method of solution squares both sides, then solves the resulting quadratic.
Considering the initial problem, we require x ≥ 0, so the x=-7 solution is extraneous.
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A graphical solution shows there is only one value of x that satisfies the equation. The other "solution" arises from considering the negative square root. It is introduced when the equation is squared.
