Last year, Bill opened an investment account with $6800 . At the end of the year, the amount in the account had increased by 24.
5% . How much is this increase in dollars? How much money was in his account at the end of last year?
1 answer:
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Answer:
A.
Step-by-step explanation:
1) to rewrite the given equation:
f(x)=2(x²+4x)-3; ⇔ f(x)=2(x²+4x+4)-3-8; ⇔ f(x)=2(x²+4x+4)-11; ⇔ f(x)=2(x+2)²-11;
2) the roots are:
3) finally, the correct answer is A.